# Arithmetic-Basic Statistics (CBSE-NET (UGC) Paper-I): Questions 1 - 6 of 7

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## Question number: 1

» Arithmetic » Basic Statistics

Appeared in Year: 2013

MCQ▾

### Question

The mean marks obtained by a class of 40 students is 65; The mean marks of half of the students is found to be 45. The mean marks of the remaining students is (December)

### Choices

Choice (4) Response

a.

60

b.

85

c.

70

d.

65

## Question number: 2

» Arithmetic » Basic Statistics

Appeared in Year: 2015

MCQ▾

### Question

A group of 210 students appeared in some test. The mean of 1/3rd of students is found to be 60. The mean of the remaining students is found to be 78. The mean of the whole group will be (December)

### Choices

Choice (4) Response

a.

80

b.

74

c.

72

d.

76

## Question number: 3

» Arithmetic » Basic Statistics

MCQ▾

### Question

If the radius of a circle is increased by 50 per cent. Its area is increased by:

### Choices

Choice (4) Response

a.

100 per cent

b.

50 per cent

c.

125 per cent

d.

75 per cent

## Question number: 4

» Arithmetic » Basic Statistics

MCQ▾

### Question

The number of observations in a group is 40. The average of the first 10 members is 4.5 and the average of the remaining 30 members is 3.5. The average of the whole group is

### Choices

Choice (4) Response

a.

15/2

b.

15/4

c.

6

d.

4

## Question number: 5

» Arithmetic » Basic Statistics

MCQ▾

### Question

If the radius of a circle is increased by 50%, the perimeter of the circle will increased by

### Choices

Choice (4) Response

a.

40%

b.

50%

c.

20%

d.

30%

## Question number: 6

» Arithmetic » Basic Statistics

MCQ▾

### Question

The price of petrol increases by 25%. By what percentage must a customer reduce the consumption so that the earlier bill on the petrol does not alter?

### Choices

Choice (4) Response

a.

33.33%

b.

30%

c.

20%

d.

25%

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