Question

cards numbered 1 to 10 are put in a bag a bag card drawn at random from the bag find the probability that the number on the drawn card is not divisible by 3 a prime number greater than 7​

Answer 1

Answer:

Let E be the event of drawing a number not divisible by 3 from the cards numbered 1 to 30

Numbers not divisible by 3 from 1 to 30=1,2,4,5,7,8,10,11,13,14,16,17,19,20,22,23,25,26,28,29

No. of favorable outcomes=20

Total no. of possible outcomes =30

We know that, Probability P(E) =

(Total no.of possible outcomes)

(No.of favorable outcomes)

=

30

20

=

3

2

Therefore, the probability of drawing a number not divisible by 3 from the cards numbered 1 to 30=

3

2

Answer 2

Answer:

7/10 is the probability of a number not divisible by 3

there are no prime numbers greater than 7 in 1 to 1