Question

Cards with numbers 1,2,3,....100 are placed in a box and mixed thoroughly.One card is drawn .What is the probability that the card drawn is :
(i)A prime number less than 30?
(ii)A multiple of 5 and 7?
(iii)A multiple of 5 or 7?

Answer 1

heya_______

Given :- 100 numbers cards

to find :- probability of..

I)A prime number less than 30
(ii)A multiple of 5 and 7
(iii)A multiple of 5 or 7


Solution :-
I ) prime number is 25
so probability is 25/100 = 1/4

ii) multiple of 5 = 20
probability = 20/100 = 1/5
and
multiple of 7 = 14
probability = 14/100


iii) probability of 5 or 7
20 + 14 /100
34/100


hope this helps!!!!