There 560 ways to choose 3 men from 16.
a) 16 men were at work demolishing an old factory when part of it collapsed, injuring 3 of them. Three of the men were apprenticies
Calculate the probability that all 3 men were apprenticies??
b) Out of 40 paving slabs, 12 have internal cracks.
Determine the probability that, in choosing 5 slabs at random, a cracked slab is not selected….
answers for a is 1/560
b = 105/703
but how??