# Statistics & Probability (IMO- Mathematics Olympiad Class 10): Questions 24 - 29 of 80

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## Question number: 24

» Statistics & Probability

MCQ▾

### Question

The average temperatures of Monday, Tuesday, Wednesday and Thursday was . The average temperature of Tuesday, Wednesday, Thursday and Friday was . If the temperature on Monday was , then the temperature on Friday was ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 25

» Statistics & Probability

MCQ▾

### Question

The mean of ten numbers is 60. If one number is excluded, then their mean is 50, the excluded number is ________

### Choices

Choice (4) Response

a.

130

b.

160

c.

140

d.

150

## Question number: 26

» Statistics & Probability

MCQ▾

### Question

The mean of 7 observations is 20. If the mean of the first 4 observations is 20 and that of the last 4 observations is 16, then the Fourth observation is ________

### Choices

Choice (4) Response

a.

3

b.

7

c.

8

d.

4

## Question number: 27

» Statistics & Probability

MCQ▾

### Question

The mean of is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 28

» Statistics & Probability

MCQ▾

### Question

If occur with frequencies respectively, then the arithmetic mean is ________

### Choices

Choice (4) Response

a.

4.4

b.

5.5

c.

3.5

d.

6.5

## Question number: 29

» Statistics & Probability

MCQ▾

### Question

A bag contains 6 Red, 9 Blue and 5 Black marbles. If a marble is drawn at random from the bag, the probability that the marble drawn is red or Blue, is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

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