Correct Answer - Option 3 : 20
Given:
The sum of two numbers is 9.
The sum of their squares is 41.
Calculation:
Let the two number be x, y.
Then, x + y = 9,
Squaring both sides, we get
⇒ x2 + y2 + 2xy = 81
Also given that, x2 + y2 = 41
⇒ 2xy = 40
⇒ xy = 20
∴ Their number product are 20.