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Alex17521 [72]
3 years ago
9

If 3 suspects who committed a burglary and 6 innocent persons are lined up, what is the probability that a witness who is not su

re and has to pick three persons will pick the three suspects by chance? That the witness picks 3 innocent persons by chance?
Mathematics
1 answer:
Nataly [62]3 years ago
7 0
The number of ways you can pick 3 people from 9 = 9*8*7 / 3*2*1 = 84

So chance of picking the 3 suspects = 1 / 84.

The number of ways to pick 3 from the 6 innocent people = 6*5*4 / 3*2*1 = 20

Chances of picking 3 innocent people = 20 / 84  or 5/21

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