# ACET (Actuarial Common Entrance Test) Statistics: Questions 64 - 69 of 201

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## Question 64

### Question

MCQ▾

A variable that can assume any value between two given points is called -

### Choices

Choice (4)Response

a.

Discrete random variable

b.

Continuous random variable

c.

Irregular random variable

d.

Uncertain random variable

## Question 65

### Question

MCQ▾

If 10 % of pens manufactured by a company are defective. The probability that a box containing 12 pens contains exactly 2 defective pens is given by

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 66

### Question

MCQ▾

The arithmetic means of X and Y are 20 and 120 respectively. There standard deviations are 5 and 25 respectively. The correlation coefficient between them is 0.8. Find the regression equation of Y on X.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 67

### Question

MCQ▾

Two dice are thrown and the sums of the numbers on the faces up is noted. The probability that this sum being 11 is-

### Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

## Question 68

### Question

MCQ▾

In how many different ways can the letters of the word ‘DETAIL’ be arranged such that the vowels must occupy only the odd positions?

### Choices

Choice (4)Response

a.

36

b.

100

c.

64

d.

90

## Question 69

### Question

MCQ▾

The mean of first prime numbers is

### Choices

Choice (4)Response

a.

5.6

b.

3

c.

3.6

d.

7

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