Statistics & Probability (IMO- Mathematics Olympiad Class 10): Questions 32 - 38 of 79

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Question number: 32

» Statistics & Probability

MCQ▾

Question

The mean of 13,34,56,12and712, is ________

Choices

Choice (4) Response
a.

25

b.

35

c.

15

d. All of the above

Question number: 33

» Statistics & Probability

MCQ▾

Question

One card is drawn from a well-shuffled deck of 52 cards the probability of neither a Club nor a king is ________

Choices

Choice (4) Response
a.

1915

b.

139

c.

913

d.

1519

Question number: 34

» Statistics & Probability

MCQ▾

Question

The mean of six numbers is 15. If one number is excluded, then their mean is 17, the excluded number is ________

Choices

Choice (4) Response
a.

7

b.

4

c.

1

d.

5

Question number: 35

» Statistics & Probability

MCQ▾

Question

Two dice are thrown at a time. The probability that the difference of the numbers shown on the dice is 2 is ________

Choices

Choice (4) Response
a.

29

b.

38

c.

67

d.

37

Question number: 36

» Statistics & Probability

MCQ▾

Question

The mean of 20 observations is 15 . if each observation is multiplied by 2, then what is the new mean?

Choices

Choice (4) Response
a.

60

b.

30

c.

70

d.

50

Question number: 37

» Statistics & Probability

MCQ▾

Question

A box contains 40 balls of two different colours, out of which x are black. One ball is drawn at random. If 20 more black balls are put in the box, the probability of drawing a black ball now will be double that of the previous probability of drawing a black ball. Then, the value of x is ________

Choices

Choice (4) Response
a.

15

b.

14

c.

12

d.

10

Question number: 38

» Statistics & Probability

MCQ▾

Question

A Motor maintains an average speed of 70 km/hr while going from P to Q and maintains an average speed of 85 km/hr while coming back from Q to P. the average speed of the motor is ________.

Choices

Choice (4) Response
a.

55kmhr

b.

60kmhr

c.

62kmhr

d.

40kmhr

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