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Therefore, probability of getting a green sector =3/5

There is one blue sector out of five sectors.

Non-blue sectors = 5 – 1 = 4 sectors

Therefore, probability of getting a non-blue sector =4/5

6.When a die is thrown, find the probability of getting:

(i) (a) a prime number

(b) not a prime number

(ii) (a) a number greater than 5

(b) a number not greater than 5

Ans. When a die is thrown, there are total six outcomes, i.e., 1, 2, 3, 4, 5
and 6.

(i) (a) 2, 3, 5 are prime numbers. So there are 3 outcomes out of 6.

Therefore, probability of getting a prime number = 3/6 =1/2

(b) 1, 4, 6 are not the prime numbers. So there are 3 outcomes out of 6.

Therefore, probability of getting a prime number =3/6 =1/2

(ii) (a) Only 6 is greater than 5. So there is one outcome out of 6.

Therefore, probability of getting a number greater than 5 = 1/6

(b) Numbers not greater than 5 are 1, 2, 3, 4 and 5. So there are 5
outcomes out of 6.

Therefore, probability of not getting a number greater than 5 = 5/6

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