Question

Find the Number of Good Plumping Workers
In a group of 15 workers, 5 are good at both Plumping and woodwork, 3 workers are good only at woodwork, and 3 are not good at either of them. How many of them are good at Plumping? a) 7 b) 4 c) 5 d) 9

Answer 1

That is C) 5 workers