JEE PYQ: Statistics Question 19
Question 19 - 2020 (07 Jan Shift 2)
If the mean and variance of eight numbers 3, 7, 9, 12, 13, 20, $x$ and $y$ be 10 and 25 respectively, then $x \cdot y$ is equal to ____.
Show Answer
Answer: 52
Solution
$x+y = 16$. $\sigma^2 = 25$. Solving gives $xy = 52$.