# Statistics and Probability (IMO- Mathematics Olympiad (SOF) Class 9): Questions 42 - 48 of 101

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## Question number: 42

» Statistics and Probability

MCQ▾

### Question

The mean, median and mode of the following numbers

12,24,12,23,24,22,25,26,25,26,26,28,25,22,26,28,29,30,11,12 are________

### Choices

Choice (4) Response

a.

22,26,25

b.

22.8,25,26

c.

25,22,25

d.

26,25,22

## Question number: 43

» Statistics and Probability

MCQ▾

### Question

Mean of 11 observations is 17.50, if one observation value 15 is deleted. The mean of remaining observations is ________

### Choices

Choice (4) Response

a.

17.75

b.

18.75

c.

15.75

d.

16.75

## Question number: 44

» Statistics and Probability

MCQ▾

### Question

If the mean of 10 observations is 20 and that of another 15 observations is 16, then the mean of 25 observations is ________

### Choices

Choice (4) Response

a.

17.6

b.

18.2

c.

17

d.

18

## Question number: 45

» Statistics and Probability

MCQ▾

### Question

The King, queen and jack of clubs are removed from a deck of 52 cards and then well-shuffled. One card id selected from the remaining cards. The probability of getting a club is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 46

» Statistics and Probability

MCQ▾

### Question

The probability of guessing the correct answer to a certain test question is. If the probability of not guessing the correct answer to this question is , then x = ________

### Choices

Choice (4) Response

a.

b.

c.

4

d.

3

## Passage

A car is going on a long journey for 16 hours, starting at 5.00 hrs. The speed of the car at different hours is given below:

 Time (in hrs): 5 7 9 11 13 17 15 19 21 Speed (in km/hour): 40 50 60 80 70 65 75 60 50

From the above table answer the following questions.

## Question number: 47 (1 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The percentage of decrease in speed during 19.00 hrs and 21.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 48 (2 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The percentage of increase in speed during 9.00 hrs and 11.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page