2971 . The area of two spheres are in the ratio 1:4. The ratio of their volume is-

A. 1 : 6
B. 1 : 8
C. 1 : 4
D. 1 : 2

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Answer: Option B

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SBAC Bank PLC || Trainee Junior Officer (28-09-2024) || 2024

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2972 . The areas of two spheres are in the ratio 1 : 4 The ratio of their volumes is

A. 1 : 6
B. 1 : 8
C. 1 : 4
D. 1 : 2

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Answer: Option B

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Standard Bank Plc || Trainee Assistant Officer (15-03-2025) || 2025

A. The price paid for the banned products did not decrease much in 2007
B. Domestic production of banned products increased at a higher rate
C. The price of a few banned products increased considerably in 2007
D. A decrease in demand for most banned products in 2007 was not the sole cause of the drop in their price

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Answer: Option D

Explanation:

Based on the options provided, the assumption that underlies the argument in the passage is:

A decrease in demand for most banned products in 2007 was not the sole cause of the drop in their price.

This assumption suggests that there were other factors besides the decrease in demand that contributed to the drop in the price of banned products in 2007. The argument relies on the idea that the decrease in supply or other factors played a significant role in causing the observed decrease in price, rather than solely relying on the decrease in demand.

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Bangladesh Bank - Assistant Director - 2010

A. In 2007 smugglers of banned products had significantly more funds
B. Domestic production of illegal drugs increased considerably in 2007
C. The authors statements were made to embarrass the officials
D. In 2007 banned products entered the country by a different set of routes

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Answer: Option B

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Bangladesh Bank - Assistant Director - 2010

A. $216
B. $360
C. $1386
D. $2160

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Answer: Option B

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2976 . The average ( arithmetic mean) of 4 different integers is 75.If the largest integer is 90, what is the least possible value of the smallest integer ?

A. 1
B. 19
C. 29
D. 33
E. 35

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Answer: Option D

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Probationary Officer | 31.03.2017 ||

A. 15
B. 12.5
C. 10
D. 25

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Answer: Option A

Explanation:

Sum of x and y = 20×2 = 40

Average of x, y and z = (40 + 5)/3 = 15.

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সহকারী পরিচালক(AD) -12.11.2021

A. 5
B. 7
C. 9
D. 11

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Answer: Option B

Explanation:

Total age of 12 students = 12 x 20 = 240 years

New average = 20 - 1 = 19 years

Total age of (12 + 1 = 13) students = 13 x 19 = 247

So, age of the new student = 247 - 240 = 7 years

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2979 . The average age of 15 people is 25 years. Out of them, total age of 2 people is 115 years. What is the average age of the other 13 people?

A. 20 years
B. 25 years
C. 22.5 years
D. 57.5 years
E. None of these

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Answer: Option A

Explanation:

Total age of 15 people = 15 x 25 = 375 years

Total age of 2 people = 115 years

Total age of the other 13 people = 275 - 115 = 160

So, the average age of the other 13 people = 160/13 = 20 years

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2980 . The average age of 40 employees in abranch of a bank is 35 years. When a new employee joined the bank the average age increased to 35.5 years. What is the age of the new employee?

A. 55.5
B. 50
C. 50.5
D. 20.5

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Answer: Option A

Explanation:

Total age of 40 employees = 40×35 = 1400 years

Total age of 41 employees = 41×35.5 = 1455.5 years

Age of the new employee = 1455.5 - 1400 = 55.5 years

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2981 . The average age of 8 men is increased by 2 years when one of them whose age is 24 years is replaced by a woman. What is the age of the woman ?

A. 35 years
B. 28 years
C. 32 years
D. 40 years

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Answer: Option D

Explanation:

মহিলাটির বয়স = 8 × 2 + 24

= 16 + 24

= 40 বছর

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2982 . The average age of A, B And C sis 30 years. If the difference between B's age and A's age is same as the difference between C's age and B's age . If D is 40 years older than B then what is the sum of the age B and D?

A. 130 years
B. 60 years
C. 75 years
D. 100 years

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Answer: Option D

Explanation:

ATQ, B - A = C - B

= > 2B = A + C

Now, A + B + C = 30 x3 = 90

= > B + (A + C) = 90

= > B + 2B = 90

= > 3B = 90 :: B = 30

D's age = 30 + 40 = 70

B + D = 70 + 30 = 100 (Ans) .

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Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯

A. 48
B. 46
C. 42
D. 45

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Answer: Option B

Explanation:

A + B + C + D + E = 40 × 5 = 200
A + B = 35 × 2 = 70
C + D = 42 × 2 = 84
Therefore,
E = (A + B + C + D + E) - (A + B + C + D)
E = 200 - 70 - 84
E = 46 years.

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অফিসার (ক্যাশ ) - Sonali | Rupali | BD Krishi | Rajshahi Krishi Unnayn | Investment Corporation Of Bangladesh - ২৯. ০৩.২০১৯

A. 22 years
B. 30 years
C. 40 years
D. 32 years

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Answer: Option D

Explanation:

দেওয়া আছে, 10 জন ছাত্রের গড় বয়স = 20

∴ 10 জন ছাত্রের গড় বয়স = 10 × 20

= 200 বছর

আবার, 2 জন নতুন ছাত্র আসার পর ,

12 জন ছাত্রের গড় বয়স = (20+2) বছর

∴ 12 জন ছাত্রের মোট বয়স = (12 × 22 ) বছর

নতুন ২ জন ছাত্রের মোট বয়স = (264 - 200)

= 64 বছর

∴ 2 জন ছাত্রের গড় বয়স = 64/2 = 32 বছর

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First Security Islami Bank Ltd | Probationary Officer | 19-02-2021

A. 16
B. 17
C. 18
D. 19

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Answer: Option C

Explanation:

Let the sum of 5 new student’s age is x

Then according to question,

(150 + x)/15 = 16

= )150 + x = 240

= )x = 90

Average of their ages = sum/number

= )90/5 = 18

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2971 . The area of two spheres are in the ratio 1:4. The ratio of their volume is-

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2972 . The areas of two spheres are in the ratio 1 : 4 The ratio of their volumes is

2973 . The argument in the passage depends on which of the following assumptions ?

2974 . The argument in the passage would be most seriously weakened if it were true that

2975 . The assessed value of a house is $72000. The assessed value is 60% of the market value of the house. If taxes are $3 for every $1000 of the market value of the houes, how much are the taxes on the house?

2976 . The average ( arithmetic mean) of 4 different integers is 75.If the largest integer is 90, what is the least possible value of the smallest integer ?

2977 . The average (arithmetic mean) of x and y is 20. If x = 5 what is the average of x. y and z?

2978 . The average age of 12 students is 20 years. If the age of one more student is included the average decreases by 1, what is the age of the new student?

2979 . The average age of 15 people is 25 years. Out of them, total age of 2 people is 115 years. What is the average age of the other 13 people?

2980 . The average age of 40 employees in abranch of a bank is 35 years. When a new employee joined the bank the average age increased to 35.5 years. What is the age of the new employee?

2981 . The average age of 8 men is increased by 2 years when one of them whose age is 24 years is replaced by a woman. What is the age of the woman ?

2982 . The average age of A, B And C sis 30 years. If the difference between B's age and A's age is same as the difference between C's age and B's age . If D is 40 years older than B then what is the sum of the age B and D?

2983 . The average age of A,B,C,D and E is 40 years. The average age of A and B is 35 years and the average of C and D is 42 years. Age of E is -

2984 . The average age of a group o f10 students was 20. The average age increased by 2 years when two new students joined the group students who joined the group?

2985 . The average age of a group of 10 students is 15 years . when 5 more students joined the group , the average age rise by 1 year. what is average age of the newly joined students?

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