Question

there are 30 cards of same size in a bag on which numbers 1 to 30 are written one card is taken out of the bag random. find the probability that number on the number on the card is not divisible by 3​

Answer 1

Answer:

2/3

Step-by-step explanation:

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

The numbers not divisible by 3 upto 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)

= 20/30

= 2/3

Therefore, the probability that the number on the selected card is not divisible by 3= 2/3

Answer 2

Step-by-step explanation:

we have given that there are 30 cards

and we have to find the probablity of the cards which are not divisible by 3

so the number are not divisible by 3 are=(1,2,4,5,7,8,9,10,11,13,14,16,17,19,20,22,23,25,26,28,29)

here total number which are not divisible by 3 are 3

so the probablity is 20/30