Question

The mean pocket money of 29 students of a class is Rs. 132. If one more student joins the class whose pocket money is Rs. 175, find the new average

Answer 1

the answer is

132*29=3828

3828+175=4003

now u can solve its average

Answer 2

The new average is 133.43.

Step-by-step explanation:

$Average= \frac{\text{Sum of all observations}}{\text{No. of observations}}$

We are given that The mean pocket money of 29 students of a class is Rs. 132.

$132 = \frac{\text{Sum of pocket money of 29 students }}{29}\\132 \times 29 = \text{Sum of pocket money of 29 students }\\3828= \text{Sum of pocket money of 29 students }$

Now we are given that one more student joins the class whose pocket money is Rs. 175,

So, No. of students = 29+1 = 30

New sum = 3828+175=4003

So,$New average = \frac{4003}{30}=133.43$

Hence The new average is 133.43.

#Learn more :

The average of 30 observation is 45. if 3 new observqtions 42,44,48 be added, find the new average​

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