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1 . If 6 and x have the same mean as 2, 4 and 24, what is the value of x?

A. 5
B. 10
C. 14
D. 36

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Answer: Option C

Explanation:

Mean of 2, 4 and 24 = (2 + 4 + 24) / 3 = 10

Now, mean of 6 and x, (6 + x)/2 = 10

or, 6 + x = 10×2 = 20

So, x = 20 - 6 = 14

2 . If 6 and X have the same mean as 2, 4 and 24, what is the value of X

A. 5
B. 10
C. 14
D. 36

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Answer: Option C

Explanation:

Mean of 2, 4 and 24 = (2 + 4 + 24) / 3 = 10

Now, mean of 6 and x, (6 + x)/2 = 10

or, 6 + x = 10×2 = 20

So, x = 20 - 6 = 14.

Bangladesh Bank - Assistant Director - 2010

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