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:

car with its speed values is given

Calculate the values as asked in question

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.

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