Question

The probability of selecting a rotten apple randomly form a heap of 900 apple is 0.18 .what is the number of rotten apple in a heap.

Answer 1

1. Let x be non rotten apples out of 900.Hence 900-x will be rotten apples
2. Probability of picking rotten apples out of is (900-x)/900
3. Given probability of selecting a rotten apple randomly form a heap of 900 apple is 0.18 i.e, (900-x)/900=0.18
4. From this we get value of x is 738 i.e, non rotten apples. Hence rotten apples are 900-x = 900-738 = 162