# Statistics and Probability (IMO- Mathematics Olympiad Class 9): Questions 15 - 22 of 101

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## Passage

One card id drawn from a well-shuffled deck of 52 cards. Find the probability of drawing

## Question number: 15 (3 of 4 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

A black face card

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 16 (4 of 4 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 17

» Statistics and Probability

MCQ▾

### Question

Mean marks scored by 50 students were found to be 70. Later it was observed that a score of 45 was misread as 54. Then the correct mean is ________

### Choices

Choice (4) Response

a.

69

b.

69.82

c.

79.82

d.

59

## Question number: 18

» Statistics and Probability

MCQ▾

### Question

The average of 15 numbers is calculated as 20. It is discovered later on that while calculating the average one number, namely 41 was wrongly read as 31. The correct average is________

### Choices

Choice (4) Response

a.

20.6

b.

19.5

c.

13.5

d.

16.5

## Question number: 19

» Statistics and Probability

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

3, 3, 3

b.

3.47, 3, 3

c.

5, 4, 3

d.

4, 3, 3

## Passage

Cards marked with the number 2 to 101 are placed in a box and mixed thoroughly. One card is drawn from this box. Find the probability that the number on the card is

## Question number: 20 (1 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

A number which is a perfect square

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 21 (2 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

A prime number less than 20.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 22 (3 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

A number less than 14

### Choices

Choice (4) Response

a.

b.

c.

d.

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