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

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## Question number: 116

Edit
MCQ▾

### Question

If = 840, = 35 then n=

### Choices

Choice (4)Response

a.

9

b.

7

c.

6

d.

8

## Question number: 117

Edit
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

Edit
MCQ▾

### Question

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

 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

Edit
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

Edit
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

Edit
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

Edit
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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