Question

A bag has ten mangoes out of which three are rotten.two mangoes are selected at random.find the probability that the mangoes are of both types

Answer 1

5/10 because if we subtract 5from 10answer is 5

Answer 2

So basically here we need to select 2 mangoes which are of different type
one rotten and one ripe
So to select a rotten we have 3 choices
and to select a ripe mango we have 7 choices
so 3C1*7C1=21
This is the event
Sample space is 10C2 for selecting any two mangoes
10C2=45
Answer=21/45
=7/15
Hope it helps
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