Question

Age of five girls in a group are 16 years 4 month, 15 years 8 month, 14 years 9 month, 15 year 3 month and 14 years 9 month , 15 years 3 month and 14 years 8 month. Find the average age per girl in the group

Answer 1

Age of five girls in a group are 16 years 4 month, 15 years 8 month, 14 years 9 month, 15 years 3 month and 14 years 9 month , 15 years 3 month and 14 years 8 month.

→ Age of 1st girl = 16 years 4 months

We know that 12 months together make one year.

So,

= $\sf{16\:+\:\frac{4}{12}}$

= $\sf{\frac{192\:+\:4}{12}}$

= $\sf{\frac{196}{12}}$ ....(1)

→ Age of 2nd girl = 15 years 8 months

= $\sf{15\:+\:\frac{8}{12}}$

= $\sf{\frac{180\:+\:8}{12}}$

= $\sf{\frac{188}{12}}$ ....(2)

→ Age of 3rd girl = 14 years 9 months

= $\sf{14\:+\:\frac{9}{12}}$

= $\sf{\frac{168\:+\:9}{12}}$

= $\sf{\frac{177}{12}}$ ....(3)

→ Age of 4th girl = 15 years 3 months

= $\sf{15\:+\:\frac{3}{12}}$

= $\sf{\frac{180\:+\:3}{12}}$

= $\sf{\frac{183}{12}}$ ....(4)

→ Age of 5th girl = 14 years 8 months

= $\sf{14\:+\:\frac{8}{12}}$

= $\sf{\frac{168\:+\:8}{12}}$

= $\sf{\frac{176}{12}}$ ....(5)

We have to find the average age of per girl in the group.

$\rm{Average \: age \: of \: 5 \: girls \: = \: \frac{Sum \: of \: all \: girls}{Number \: of \: girls}}$

= $\rm \dfrac{ \frac{196}{12} + \frac{188}{12} + \frac{177}{12} + \frac{183}{12} + \frac{176}{12}}{5}$

= $\rm{\dfrac{920}{60}}$

= $\rm{\dfrac{46}{3}}$

Answer 2

Hello mate✌✌✌

Kindly refer to the attachment.

Hope it helps✌✌✌