Question

ANSWER ALL QUESTIONS

1. In a class of 28 pupils, 13 have pencils, 9 have erasers and 9 have neither pencils nor erasers. How
many pupils have both pencils and erasers?
2. A universal set, U consists of prime numbers with P and Q as subsets of U. If P and Q are given by
P = {n: 3(n + 1) = 2(n + 10)}, and Q = {n: 7<n<31}, list the elements of P n Q. ​

Answer 1

Aye yu taking a test?

Answer 2

1. 3

29-9=19

13+9=22

22-19=3

I don't know number 2, sorry.