Consider three observations | Statistics| JEE-MAIN 2021

JEE MAIN 2021

16-03-2021 S1

Question

Consider three observations a, b and c such that b = a + c. If the standard deviation of a + 2, b + 2, c + 2 is d, then which of the following is true ?

Select the correct option:

b2 = 3(a2 + c2) + 9d2

b2 = a2 + c2 + 3d2

b2 = 3(a2 + c2 + d2)

b2 = 3(a2 + c2) – 9d2

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Mathematics

Easy

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