Question

The mean pocket money of 29 students of class is rupees 132 if one more student join the class those pocket money is a 171 find the new mean.

Answer 1

Answer:

133.3

Step-by-step explanation:

we know,

Mean pocket money = Sum of pocket money of all students ÷ Total students

So,

Sum of pocket money of all students = Mean pocket money × Total students

so, in case of 29 students with mean pocket money of 132 it will be

Sum of pocket money of all students = 132×29 = 3828

if one more student joins the total number of students is now 30

pocket money of new student is 171

so, sum of pocket money of 30 students = 3828 + 171 = 3999

Mean pocket money = 3999 ÷ 30 = 133.3