Question

find mean of given data number of students 15-20 20-25 25-30 30 -35 35 -40 40-45 45-50 50-55 number of states 3,8,9,10,3,0,0,2​

Answer 1

Answer:

step by step explanation

total frequency 35

mid value of first class 17.5

'' ''second class 22.5

"' '"third class 27.5

" "fourth class 32.5

" " fifth class 37.5

" "sixth class 42.5

" "seventh class 47.5

" "eight class 52.5

so answer is 27.42857143