# Statistics and Probability (IMO- Mathematics Olympiad (SOF) Class 9): Questions 78 - 84 of 101

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## Question number: 78

» Statistics and Probability

MCQ▾

### Question

Two dice are thrown simultaneously, the odds in favour of getting the sum 5 is________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 79

» Statistics and Probability

MCQ▾

### Question

The median of the observation 2,1, 12,29,25,12,10,4, 5 is ________

### Choices

Choice (4) Response

a.

12

b.

25

c.

15

d.

10

## Question number: 80

» Statistics and Probability

MCQ▾

### Question

The mean of 24 observations is 35. If the mean of the first 12 observations is 31 and that of the last 12 observations is 38, then the 12th observation is ________

### Choices

Choice (4) Response

a.

14

b.

15

c.

11

d.

12

## Question number: 81

» Statistics and Probability

MCQ▾

### Question

In a mathematics test given to 15 students, the following marks (out of 100) is recorded: 45,56,78,54,75,34,68,98,87,99,90,76,55,77,68, then mean, median and mode of this data are respectively ________

### Choices

Choice (4) Response

a.

60.67,75,65

b.

70.67,77,68

c.

70.67,75,68

d.

55.26,78,65

## Question number: 82

» Statistics and Probability

MCQ▾

### Question

Average of 10 numbers is 12. What should be added as 11th number to make the average 13?

### Choices

Choice (4) Response

a.

28

b.

25

c.

30

d.

23

## Question number: 83

» Statistics and Probability

MCQ▾

### Question

If the mean of 17 observations is 22 and that of another 18 observations is 10, then the mean of 35 observations is ________

### Choices

Choice (4) Response

a.

24

b.

15.83

c.

15

d.

24.8

## Question number: 84

» Statistics and Probability

MCQ▾

### Question

Two dice are thrown simultaneously. The probability of getting an even number as the sum is________

### Choices

Choice (4) Response

a.

b.

c.

d.

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