Question

The average age of 15 boys of
a class is 11 years 3 months if.
e voy of 12 years 7 months join
that class then what will be the
average age of boys of the class.​

Answer 1

Answer:

11years 4 months............

Answer 2

Answer:

11yrs 4 months

Step-by-step explanation:

x1 +x2 +x3 ... x15/15= 11yr 3 months

then x1 + x2 + x3 ... + x15= 15 × 11yr 3 months

if another boy enters with age 12yr and 7months. Then avg is

x1+x2+x3+....x15 + 12yr 3months/16

we already know x1+x2+x3+...x15 value.then substitute

15×11yr 3 months +12yr 7 months/16

(15×135+151)months/16

2176/16=136months which is equal to 11yr 4 months

Hope it helped