IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 625 - 630 of 929

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Question number: 625

» Everyday Mathematics

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MCQ▾

Question

Ten people are planning to share equally the cost of a rental bike. If one person withdraws from the arrangement and the others share equally the entire rental of the bike, then the share of each of the remaining persons is increased by ________ of the original share.

Choices

Choice (4) Response

a.

b.

7

c.

d.

Question number: 626

» Statistics and Probability

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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.

12

b.

15

c.

13.5

d.

14.5

Question number: 627

» Polynomials

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MCQ▾

Question

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 628

» Statistics and Probability

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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.

5

b.

4

c.

6

d.

3

Question number: 629

» Statistics and Probability

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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.

26,25,22

c.

22.8,25,26

d.

25,22,25

Question number: 630

» Statistics and Probability

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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.

15.75

b.

17.75

c.

16.75

d.

18.75