JEE Main 2008 — Statistics Question with Solution
From: AIEEE 2008
Question
The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80. Then which one of the following
gives possible values of a and b?
Choose an option
Show full solutionCorrect option: D
Correct answer
Da = 3, b = 4
Step-by-step explanation
Given that,
Mean of a, b, 8, 5, 10 = 6
a + b + 23 = 30
a + b = 7 ....... (1)
Variance
By using (1) we get,
a = 3, 4
then b = 4, 3.
Mean of a, b, 8, 5, 10 = 6
a + b + 23 = 30
a + b = 7 ....... (1)
Variance
By using (1) we get,
a = 3, 4
then b = 4, 3.
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