JEE Mains 8-Apr-2023 Shift 2 Solved Paper

Let the mean and variance of 12 observations be ‌

9

2

and 4 respectively. Later on, it was observed that two observations were considered as 9 and 10 instead of 7 and 14 respectively. If the correct variance is ‌

m

n

, where m and n are coprime, then m+n is equal to