Statistics and Probability (IMO- Mathematics Olympiad Class 9): Questions 36 - 41 of 101

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Question number: 36

» Statistics and Probability

MCQ▾

Question

Algebraic sum of the deviation of a set of values of a data from their mean is ________

Choices

Choice (4) Response

a.

<0

b.

=0

c.

>0

d.

0

Question number: 37

» Statistics and Probability

MCQ▾

Question

Two dice are thrown simultaneously. The probability of getting a multiple of 2 on one die and a multiple of 3 on the other is ________

Choices

Choice (4) Response

a.

536

b.

512

c.

112

d.

1136

Question number: 38

» Statistics and Probability

MCQ▾

Question

The following observations have been arranged in the ascending order. If the median of the data 13, 26, 32, 37, x + 2, x + 4, 62, 68, 74, 85 is 43, then the value of x is ________

Choices

Choice (4) Response

a.

44

b.

42

c.

40

d.

46

Question number: 39

» Statistics and Probability

MCQ▾

Question

The probability of guessing the correct answer to a certain test question is x2 . If the probability of not guessing the correct answer to this question is 23 , then x = ________

Choices

Choice (4) Response

a.

23

b.

2

c.

3

d.

13

Question number: 40

» Statistics and Probability

MCQ▾

Question

The average of 12 students is 15. The marks of a student who scored zero were wrongly taken as 18 and average was determined. The correct average marks is________

Choices

Choice (4) Response

a.

15

b.

12

c.

14.5

d.

13.5

Question number: 41

» Statistics and Probability

MCQ▾

Question

The average weight of the students of a class is 30 kg. 3 new students with the average weight of 36 kg. Having joined the class, the average weight of the class is increased by 3 kg. Find the number of students in the class originally?

Choices

Choice (4) Response

a.

3

b.

4

c.

5

d.

6

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