Question

The average age of Shikha and her her husband Amit is 48 years the average age of Shikha Amit and their daughter advika is 39 year. Find the age of advika

Answer 1

Answer:

21 years

Step-by-step explanation:

We know,

Average = total sum of items/number of items

Here, average age of Shikha and Amit is 48 years.

So,we can write,

48 = (sum of age of Shikha and Amit)/2

or, sum of age of Shikha and Amit = 48 x 2

or, sum of age of Shikha and Amit = 96

Also,

average age of Shikha, Amit and Advika is 39 years.

So,we can write,

39 = (sum of age of Shikha, Amit and Advika)/3 [because there are 3 people now]

or, sum of age of Shikha, Amit and Advika = 39 x 3

or, sum of age of Shikha, Amit and Advika = 117

So,

Age of Advika = 117 - 96 = 21 years