Q. 54.2( 6 Votes )

# By taking the ass

Answer :

Here first we’ll find the class marks -

We’ll first assume a mean A = 25 and here h = 15 - 5 = 10.

Now we’ll find the u_{i}

Now,

Where, = Mean, u_{i} = calculated values of x and f_{i} = frequency for that x.

⇒ = 23.25

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