JEE Main 2021 — Statistics Question with Solution
From: JEE Main 2021 (Online) 31st August Morning Shift
Question
The mean of 10 numbers 7 8, 10 10, 13 12, 16 14, ....... is ____________.
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Show full solutionCorrect answer: 398
Correct answer
398
Step-by-step explanation
7 8, 10 10, 13 12, 16 14 ........
Tn = (3n + 4) (2n + 6) = 2(3n + 4) (n + 3)
= 2(3n2 + 13n + 12) = 6n2 + 26n + 24
S10 =
= 3980
Mean
Tn = (3n + 4) (2n + 6) = 2(3n + 4) (n + 3)
= 2(3n2 + 13n + 12) = 6n2 + 26n + 24
S10 =
= 3980
Mean
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