JEE Math Practice Question
The sum of 100 observations and the sum of their squares are 400 and 2475, respectively. Later on, three observations, 3, 4 and 5, were found to be incorrect. If the incorrect observations are omitted, then the variance of the remaining observations is :
- A.8.25
- B.8.50
- C.8.00
- D.9.00
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