Question

The average mark of a 10 students is 7.if each is mulitipled by 12.then average is

Answer 1

Let the sum of marks of 10 students be x

A/q,
$\frac{x}{10} = 7$
$= > x = 70$
Now,
Since Each number is multiplied by 12
Therefore
Total marks to be added=12×10
=120

Therefore
New sum of Marks = x+ 120
= 70+120
= 190

Therefore
New average = 190/10
=19