Question

cards with numbers 1 2 3.....100 are placed in a box.and mix thoroughly. one card is drawn find probability that the card drawn is a multiple of 5 or 7

Answer 1

2/100 is answer because 7-5=2

Answer 2

Numbers that can be multiplied with 5 from numbers 1-100 = 20 and the numbers that can be multiplied it’s 7 from the numbers 1-100 is 14.

So probability is 20+14/100 = 34/100 = 17/50

Peace! ✌