JEE Main 2020 — Statistics Question with Solution
From: JEE Main 2020 (Online) 2nd September Evening Slot
Question
If the variance of the terms in an increasing A.P.,
b1 , b2 , b3 ,....,b11 is 90, then the common difference of this A.P. is_______.
b1 , b2 , b3 ,....,b11 is 90, then the common difference of this A.P. is_______.
Enter your answer
Show full solutionCorrect answer: 3
Correct answer
3
Step-by-step explanation
Let the common difference = d
and
...
Variance =
As A.P is increasing so d should be positive
d = 3
and
...
Variance =
As A.P is increasing so d should be positive
d = 3
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