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Class 10
Mathematics
Probability
a game of chance consists of spinning an arrow whi...

Question:
A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8 (see Fig. 15.5 ), and these are equally likely outcomes. What is the probability that it will point at
(i) 8 ?
(ii) an odd number?
(iii) a number greater than 2?
(iv) a number less than 9?

Answer:

(i) Probability of getting number 8 = 1/8

(ii) Total odd numbers on the wheel = 4

Probability of getting an odd number = 4/8 = ½

(iii) Number greater than 2 = 6

Probability of getting no greater than 2 = 6/8 = ¾

(iv) Numbers less than 9 = 8

Probability of getting a no. Less than 9 = 8/8 = 1

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