Question

The mean weight of a class of 38 students is 51kg. If the weight of a teacher be included, the mean increases by 400gms. Find the weight of a teacher.

Answer 1

Answer:

The answer is 66.6 kgs

Step-by-step explanation:

given: mean(m1)= 51,

no of students= 38

mean after teachers weight(m2)= 400..

we,, have,, m1= sum of WEIGHT of all students÷ no of students. let the total mass of all students be 'm'

51= m/38

m= 38×51= 1938..kg

then the weight of teacher=>>>

m2= m+ weight of teacher/ no of people.

let the weight of teacher be m'

51.4= 1938+ m'/ 38+1

51.4×39= 1938+m'

m'= 2004.6-1938= 66.6kg..

Hope this will help u out.