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in Class VIII Maths by (-3,446 points)

A die is thrown, find the probability of getting:
(i) a prime number
(ii) a number greater than 4
(iii) a number not greater than 4.

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1 Answer

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A die has six numbers: 1, 2, 3, 4, 5, 6
∴ Number of possible outcomes = 6

(i) a prime number

Number of favourable outcomes = a prime number = 1, 3, 5 which are 3 in numbers

P(E) = Number of favourable outcomes/Number of all possible outcomes

= 3/6 = 1/2

(ii) Number of favourable outcomes = greater than four i.e. two number 5 and 6

∴ P(E) = Numbers of favourable outcomes/Number of all possible outcomes

= 2/6  = 1/3

(iii) Number of favourable outcome = not greater than 4 or numbers will be 1, 2, 3, 4 which are 4 in numbers

∴ P(E) = Numbers of favourable outcome/Number of all possible outcome

= 4/6 = 2/3

by (15 points)
Sir If two dice are their so how we can find prime no.

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