Please help me this is hard

Question

In a bag, In a bag, there are cards numbered from 40 to 49. Let:

1. Event A be selecting & a multiple of 3.
2. Event B be selecting a card greater than 46.

What is the P(A ∪ B)?

Answer 1

Multiple of 3 is getting 42, 45 or 48

Getting higher than 46 means 47, 48 or 49

Only 48 is both >46 and divisible by 3

There are 10 possible draws from 40 to 49.

That's 1 out of 10 possibilities or 1/10=10% chance P(AUB)=1/10

Probability is the number of ways of getting AUB divided by the total number of possible draws of the card