Given that P(A)=0.68 and P(B)=0.01.
(a) We have to determine the value of P(A U B) when A and B are independent.
We know that when two events A and B are independent,
Now , we also know that
...................................(1)
(b) Now in the second case, we are required to find the value of P(A U B) when A and B are mutually exclusive.
When two events A and B are mutually exclusive,
So,
[by using the formula in (1)]
Please leave a comment if there is any doubt. There are two different answers for the two different cases.
All the steps and explainations are given.
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