Four persons are to be choosen from a group of 3 m | Probability Questions & Answers

Q:

Find the range and mode of the data 17, 18, 28, 19, 16, 18, 17, 29, 18

A) 12 and 18	B) 13 and 18
C) 12 and 17	D) 11 and 17

Answer & Explanation Answer: B) 13 and 18

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Q:

Find the standard deviation of {11, 7, 10,13, 9}

A) 1	B) 2
C) 4	D) 5

Answer & Explanation Answer: B) 2

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Q:

A table tennis player, lost 12 games out of 18 games played. Calculate the games won in terms of decimal.

A) 0.667	B) 0.067
C) 0.50	D) 0.333

Answer & Explanation Answer: D) 0.333

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Q:

A sequence $a, ax, {ax}^{2}, . . . . . ., {ax}^{n}$ , has odd number of terms. Then the median is

A) axn2+1	B) axn2-1
C) axn-1	D) axn2

Answer & Explanation Answer: D) axn2

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Q:

The mean of a distribution is 15 and the standard deviation is 5. What is the value of the coefficient variation?

A) 16.66%	B) 66.66%
C) 33.33%	D) 100%

Answer & Explanation Answer: C) 33.33%

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Q:

If the standard deviation of a population is 3, what would be the population variance?

A) 9	B) 6
C) 8	D) 15

Answer & Explanation Answer: A) 9

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Q:

The variance of a set of data is 169. Then the standard deviation of the data is

A) +-13	B) 13
C) 69	D) 84.5

Answer & Explanation Answer: B) 13

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Q:

If the standard deviation of a population is 10, what would be the population variance?

A) 100	B) 30
C) 5	D) 20

A) 2/7	B) 3/7
C) 4/7	D) 3/7

Four persons are to be choosen from a group of 3 men, 2 women and 4 children. Find the probability of selecting 1 man,1 woman and 2 children.

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