Question

Cards are marked with natural numbers 2 to 20 are placed in a box and mixed
thoroughly. One card is drawn from the box. Find the probability that the
number on the card is a prime number,​

Answer 1

Answer

Solution(ii):

Let F be event of drawing a card with prime number from the cards with numbers 1 to 20

Prime numbers from 1 to 20=2,3,5,7,11,13,17,19

No. of favorable outcomes=8

Total no. of possible outcomes =20

We know that, Probability P(F) =

(Total no.of possible outcomes)

(No.of favorable outcomes)

=

20

8

=

5

2

Therefore, the probability that a card with prime number is selected from numbers 1,2,3,...,20 =

5

2

Mark as BRAINLIEST

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