the digits 0 to 9

Question

P(obtaining a prime number OR obtaining an odd number)
P(obtaining a prime number OR obtaining a number divisible by 4)
P(obtainig a number divisible by 4 or obtaining an odd number)

Answer 1

I will do the first one. The possible results are 1,2,3,5,7,9 . Any one of those is a prime or odd number
Pr= 6/10

Answer 2

this odd number