Question

Cards marked with numbers 1, 3, 5… 49 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 (i) divisible by 3 (ii) a composite number (iii) not a perfect square (iv) multiple of 3 and 5.

Answer 1

1)16/49 3)43/49 4) multiple of 3- 16/49 multiple of 5- 3/49

Answer 2

Answer:

Total no of outcomes: 25

(i) cards marked with numbers which are multiples of 3 are 3,9,15,21,27,33,39 and 45

So,P (getting a number divisible by 3)= 8/25

(ii)P( composite number)=10/25

(iii)P (not a perfect square)=1-P (perfe-

ct square)=1-4/25=21/25

(iv)P (multiple of 3 and 5)=2/25

THANKS

Step-by-step explanation: