Question

Twenty-five cards bearing number 1 to 25 are placed in a box one card is drawn at random complete the following activity to find the probability of the event that A that the number on the card is a prime number ​

Answer 1

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1 ) Total outcomes = 30

Favourable outcomes of getting a prime number greater than 7 = 6 { 11, 13, 17, 19, 23, 29 }

P ( x ) = Favourable outcomes / Total outcomes

P ( getting a prime number greater than 7 ) = 6 / 30 = 1 / 5

2 ) Total outcomes = 30

Favourable outcomes of getting not a perfect square = 25 { 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30 }

P ( x ) = Favourable outcomes / Total outcomes

P ( getting not a perfect square ) = 25 / 30 = 5 / 6

hope it helps you....