\

Mutually exclusive events:

\

If E and F are mutually exclusive events,

\

$\"\"$

\

The events are $\"\"$ and $\"\"$ .

\

If A and B are mutually exclusive events,

\

$\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in above equation.

\

$\"\"$

\

$\"\"$

\

\

$\"\"$