ACET (Actuarial Common Entrance Test) Statistics: Questions 116 - 122 of 201

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Question number: 116

» Combinatorial Probability

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MCQ▾

Question

If = 840, = 35 then n=

Choices

Choice (4)Response

a.

9

b.

7

c.

6

d.

8

Question number: 117

» Probabilities » Basic Rules of Probabilities

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MCQ▾

Question

A die is thrown thrice. Find the probability of getting an odd number atleast once.

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 118

» Measures of Location » Mean

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MCQ▾

Question

The arithmetic mean of the following frequency distribution is 52.5. Find the missing frequency.

Frequency distribution Frequency distribution

Classes

0 - 20

20 - 40

40 - 60

60 - 80

80 - 100

Frequency

15

22

37

p

21

Choices

Choice (4)Response

a.

21

b.

26

c.

25

d.

20

Question number: 119

» Probabilities » Basic Rules of Probabilities

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MCQ▾

Question

An urn contains 5 white and 3 black balls and 4 balls are drawn at random. The probability of getting equal number of black and white balls is

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 120

» Measures of Spread » Variance

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MCQ▾

Question

In a distribution, . Find the value of standard deviation, variance and coefficient of variation.

Choices

Choice (4)Response

a.

4,16,200%

b.

8,64,300%

c.

4,16,100%

d.

16,4, 400%

Question number: 121

» Continuous Random Variables » Probabilities

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MCQ▾

Question

If probability density function (pdf) of a continuous random variable X is

.

Find

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 122

» Measures of Location » Mean

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MCQ▾

Question

The mean height of eight students is 152 cm. Two more students of heights 143 cm and 156 cm join the group. New mean height is equal to

Choices

Choice (4)Response

a.

153

b.

151

c.

152.5

d.

151.5

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