Question

cards marked with numbers 1,3,5......101 are placed in a bag and mixed thoroughly a card is drawn at random from the bag find the probability that the no. on the drawn card is (i)less than 19 (ii) a prime no. less than 20

Answer 1

Answer:

Step-by-step explanation:

Total no. of outcomes = 51

1 . P(E) = 18/51

Since there are 18 no.

2.P(E) = 7/51

Since prime no. less than 20 are 2,3,5,7,11,13,17

Answer 2

Step-by-step explanation:

Total number of cards = 51

(i) Favorable outcome = Numbers less than 19 = 1, 3, 5, 7, 9, 11, 13, 15, 17

Favorable number of outcomes = 9

P(getting a card number less than 19) = 9/51

(ii) Favorable outcome = a prime number less than 20 = 3, 5, 7, 11, 13, 15, 17, 19

Favorable number of outcomes = 7

P(getting a card with a prime number less than 20) = 7/51