Statistics & Probability (IMO- Mathematics Olympiad (SOF) Class 10): Questions 32 - 38 of 80

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Question number: 32

» Statistics & Probability

MCQ▾

Question

The mean of is ________

Choices

Choice (4) Response

a.

b.

c.

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.

b.

c.

d.

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 ________

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Choice (4) Response

a.

b.

c.

d.

Question number: 36

» Statistics & Probability

MCQ▾

Question

The mean of 20 observations is. 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.

b.

c.

d.

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