Question

It is equally probable that the pointer on the spinner shown will land on any one of the eight​ regions, numbered 1 through 8. If the pointer lands on a​ borderline, spin again. Find the probability that the pointer will stop on an odd number or a number greater than 6 .

Answer 1

P(odd number) = 1/2

P(number greater than 6) = 3/8

P(odd number greater than 6) = 1/8

P(odd number or number greater than 6)

= 1/2 + 3/8 - 1/8 = 1/2 + 1/4 = 3/4