Question

What is the probability of spinning a prime number and an odd number on a spinner numbered 1 to 8 ? ​

Answer 1

Numbers which are prime and odd would be 3, 5, 7
(1 is not considered a prime number)

so prob(what you asked for) = 3/8

Answer 2

unless "a prime number and an odd number" means on two spins, so that would be
2 * 4/8 * 4/8 = 1/2