Question

on a class of 25 students with roll numbers 1 to 25, a student is picked up at random to answer a question. find the probability that the roll number of the selected student is either a multiple of 5 or 7

Answer 1

multiple of 5=5/25=1/5

multiple of 7=3/25

Answer 2

Answer:

P(e) =5+3/25=8/25