Question

a bag contains 25 cards numbered from 1 to 25. A card is drawn at random from the bag . find the probability that the number on the drawn card is:-
i) divisible by 3 or 5
ii)a perfect square number​

Answer 1

Step-by-step explanation:

Total cards n(S) = 25.

(i)

Let E be the event of drawing a card divisible by 3 or 5.

Number divisible by 3 = 3,6,9,12,15,21,24

Number divisible by 5 = 5,10,15,20,25

Number divisible by 3 or 5 = 12

∴ n(E) = 12

Therefore,

Required probability = n(E)/n(S)

                                   = 12/25

(ii)

Perfect Square = 1,4,9,16,25.

Required probability = 5/25

                                  = 1/5

Hope it helps!

Answer 2

Answer:

Cards=25

no divisible with 3 and 5=3,5,6,9,10,12,15,18,20,21,24,25

I)12/25

perfect sq no=1,4,9,16,25

ii)p(perfect square)=5/25