Question

the average age of 8 persons is 40 yrs. A person aged 60 yrs leave thr group and two persons, each of age 23 yrs join the group. the average age of the new group is​

Answer 1

Answer:

Step-by-step explanation:

28 year 3 month=113/4 years

total sum of age of all 16 person =16×113/4=452

total sum of age of two persons =58+58=116

now sum of age of leaft 14 person =452-116=336

so avarage age of remaining person =336/14=24 years

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Answer 2

Answer:

So the average age of the new group is 34 years.

Given:

Average of 8 persons = 40 years

A person aged 60 yrs leave the group and two persons, each of age 23 yrs join the group.

To Find:

Find  the average age of the new group

Solution:

Average of 8 persons = 40 years

So the sum of ages of 8 persons = 40x8

=320 years

A person aged 60 yrs leave the group,

So the sum of left 7 persons = 320-60

                                               =260 years

two persons, each of age 23 yrs join the group

So the sum of ages of new group of 9 persons = 260+23x2

                                                                              =260+46

                                                                              =306 years

So the average age of new group = 306/9

                                                         = 34

So the average age of the new group is 34 years.