Question

the average age of a family of 7 members is 23 years.if the average age of the youngest member be 7 years then find the average of the family when the youngest member was 1 year old​

Answer 1

total age of family member =23×7=161

now we have to find average age 6 year ago.

so total age 6 year ago=161-7×6

=161-42

= 119

so average age would be 119/7

=17 years

Answer 2

The average age of the family is 17 years.

Step-by-step explanation:

Since we have given that

Number of members = 7

Average= 23 years

So, sum of ages of members would be

$23\times 7=161$

If the average age of youngest member = 7 years

So, the average of the family when he is 1 year old.

It means 6 years ago,

So, sum of ages 6 years ago would be

$161-7\times 6\\\\=161-42\\\\=119$

So, the average of the family would be

$\dfrac{119}{7}=17$

Hence, the average age of the family is 17 years.

# learn more:

The average age of 6 members is 22 years.if the age of the youngest member be 7 years what was the average age of the family at the birth of the youngest member

https://brainly.in/question/2875498