Question

5. The mean pocket money of 29 students of a class is 132. If one more student joins the class wh
pocket money is 171, find the new mean.
6. The mean height of 11 friends is 155.2 cm. If one friend whose height is 158 cm leaves, find
leicht​

Answer 1

Answer:

5) 133.3

6) 155.4

Step-by-step explanation:

5) mean of 29 students = 132

sum of money/29=132

sum of money=132x29=3828

new sum of money when a student joins=3828+171=3999

new mean= 3999/30= 133.3

6) mean height of 11 friends=155.2cm

sum of heights/11=155.2

sum of heights=155.2x11=1707.2cm

new sum of height when a student leaves=1707.2-158=1549.2cm

new mean=1549.2/10=154.92