Question discussion

The variance of the number obtained in a single throw of a fair six-faced die is

2335Medium DSSSB TGT Computer Science 0 replies

The variance of the number obtained in a single throw of a fair six-faced die is

  • A7/2
  • B35/12
  • C91/6
  • D17/6
Correct answer: B

Explanation

E(X) = 7/2 and E(X²) = 91/6, so Var(X) = 91/6 − 49/4 = 35/12 ≈ 2.92.

Discussion 0

Nobody has replied yet. Start the discussion!