$\"\"$

Probability of event A, $\"\"$ .

Probability of event B, $\"\"$ .

$\"\"$ $\"\"$

The events A and B are overlapping. So, the fomula is $\"\"$

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

$\"\"$ (The common denominator is 10)

$\"\"$ (Add: $\"\"$ )

$\"\"$ (Subtact: $\"\"$ ) $\"\"$

The probability of overlapping events A and B is $\"\"$ .