Question

calculate mean from the following data using short cut method
marks
less than 10
less than 20
less than 30
less than 40
less than 50
no of student
7
18
25
35
50​

Answer 1

Answer:

first used mean formula

see in mean formula you have Doo cross multiple n by crossmultiple divide both the factors n by factorization of that you will the answer

n if you want in short then Doo it directly but step by step the only mam or teacher will give you marks.