Statistics and Probability (IMO- Mathematics Olympiad Class 9): Questions 29 - 35 of 101

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Question number: 29

» Statistics and Probability

MCQ▾

Question

The median of the observation 3, 5, 9, 5, 4, 3, 1 is ________

Choices

Choice (4) Response

a.

5

b.

3

c.

4

d.

1

Question number: 30

» Statistics and Probability

MCQ▾

Question

If the mode of the following data 6, 8, 7, 6, x, 6, 4, 8, 7, 4, 8, 7 is 6, then value of x is ________

Choices

Choice (4) Response

a.

8

b.

6

c.

4

d.

1

Question number: 31

» Statistics and Probability

MCQ▾

Question

The mean weight of 60 students in a class is 40 kg. The mean weight of boys is 50 kg while that of the girls is 30 kg. the number of boys and girls are________

Choices

Choice (4) Response

a.

20, 40

b.

30, 30

c.

35, 25

d.

25, 35

Question number: 32

» Statistics and Probability

MCQ▾

Question

A contractor employed 10 labourers at Rs. 60 each per day, 12 labourers at Rs. 40 each per day, 8 labourers at Rs. 20 each per day and 6 labourers at Rs. 10 each per day. The average wages paid is ________

Choices

Choice (4) Response

a.

Rs. 60

b.

Rs. 36

c.

Rs. 26

d.

Rs. 40

Question number: 33

» Statistics and Probability

MCQ▾

Question

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball, find the n umber of blue balls in the bag.

Choices

Choice (4) Response

a.

15

b.

10

c.

5

d.

20

Question number: 34

» Statistics and Probability

MCQ▾

Question

Two coins are tossed simultaneously. The probability of getting at least one head is ________

Choices

Choice (4) Response

a.

12

b.

14

c.

0

d.

34

Question number: 35

» Statistics and Probability

MCQ▾

Question

The mean of 13 observations is 14. If the mean of the first 7 observations is 12 and that of the last 7 observations is 16, then the 7th observation is ________

Choices

Choice (4) Response

a.

12

b.

16

c.

14

d.

18

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