# Statistics and Probability (IMO- Mathematics Olympiad Class 9): Questions 96 - 101 of 101

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## Question number: 96

» Statistics and Probability

MCQ▾

### Question

In a class test, in Science, 45 students scored 88 marks, 15 students scored 75 marks and 5 scored 60 marks. The mean of their score is (approximately) ________

### Choices

Choice (4) Response

a.

75 marks

b.

83 marks

c.

80 marks

d.

90 marks

## Question number: 97

» Statistics and Probability

MCQ▾

### Question

The mean, median and mode of the following numbers 2, 4, 5, 6, 7, 6, 5, 4, 3, 2, 1, 1, 1, 6, 8, 8, 4, 3, 2, 2 are________

### Choices

Choice (4) Response

a.

3, 4, 3

b.

4, 4, 2

c.

3, 3, 5

d.

3, 4, 5

## Question number: 98

» Statistics and Probability

MCQ▾

### Question

Mean marks scored by 100 students were found to be 120. Later it was observed that a score of 59 was misread as 95. Then the correct mean is ________

### Choices

Choice (4) Response

a.

179.82

b.

169

c.

169.82

d.

119.64

## Question number: 99

» Statistics and Probability

MCQ▾

### Question

A contractor employed 14 labourers at Rs. 18 each per day, 12 labourers at Rs. 22 each per day, 9 labourers at Rs. 32 each per day and 5 labourers at Rs. 62 each per day. The average wages paid is ________

### Choices

Choice (4) Response

a.

Rs. 28

b.

Rs. 14

c.

Rs. 30

d.

Rs. 26

## Question number: 100

» Statistics and Probability

MCQ▾

### Question

One card is drawn from a well-shuffled deck of 52 cards. The probability of drawing an ace is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 101

» Statistics and Probability

MCQ▾

### Question

The mean of 18 observations is 30. If the mean of the first 8 observations is 25 and that of the last 10 observations is 34, then the 8th observation is ________

### Choices

Choice (4) Response

a.

68

b.

70

c.

66

d.

58

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