Question

One card is drawn at random from the number cards numbered from 1 to 20.Find the probability that the card may be a prime or even numbered card.

Answer 1

prime 2,3,5,7,11,13,17,19=8

total no 20

probability=8/20

=2/5

even no

2,4,6,8,10,12,14,16,18,20=10

probability =10/20

1/2

Answer 2

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total number of outcomes=20

1⃣favourable outcomes=8

probability of getting a prime number=8/20=2/5

2⃣favourable outcomes =11

probability of getting a composite numer=11/20

3⃣favourable outcomes =6

probability getting a multiple of 3=6/20=3/10

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