Question

What is the probability that a number selected from the numbers 1,2,3,4,……20 is not a multiple of 3?

Answer 1

Answer:

not multiples of 3 = 1,2,4,5,7,8,,10,11,13,14,16,17,18,19,20

total out comes =20

favourable outcomes = 14

p= 14 / 20 =7/10

so the answer is 7/10