Q. 3

# The marks obtaine A. 42

B. 64

C. 60

D. 56

Answer :

We know, Average = Mean

Also,

Where, = Mean, x_{i} = observations and n = no. of observations.

⇒ = 60

∴ mean marks = 60

(A)doesn’t match the solution.

(B) doesn’t match the solution.

(D) doesn’t match the solution.

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