Question

a box contains 20 cards numbered from 1 to 20 card is drawn at random from the box find the probability that the number on the card drawn is
1. divisible 2 or 3
2. a prime number ​

Answer 1

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here total no of outcomes =20

1.p(of getting no divisible by 2 or 3 )is=

13/20

2.p(of getting prime no )is=

8/20

=> 2/5

Answer 2

1. no. that divisible by 2 and 3 are:

1,2,3,4,6,8,9,10,12,14,15,16,18,20

probability = 14/20 = 7/10.

2. prime no. are:

2,3,5,7,11,13,17,19

probability = 8/20 = 2/5

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