Question

the average age of a a group of friends is 32 years. one more friend of age 25years joined the group. how many friends are there in the group now if the sum of their ages is 249 years​

Answer 1

Answer:

Average age of the group was 32 years. Age of the newly joined friend is 25 years.

Present sum of ages of the group is 249

Concept Used:

Average = Sum of observation ÷ Number of observation

Calculation:

Present sum of ages is 249 years

Before joining the boy of age 25 year sum of ages = 249 - 25 = 224 years

Then their average age was 32 years

Number of friends was = 224 ÷ 32 = 7

Present number of friends = 7 + 1 = 8

∴ There are 8 friends no

may be helpful

Answer 2

Explanation:

Average age of group was 32 years.

Age of newly joined friend is 25 years.

Present sum of ages of the group is 249 years.

Average =sum of observation ÷ number of observation

Present sum of ages is 249 years.

Before joining the boy of age 25 year

Sum of ages = 249-25=224 years

Then their average age was 32 years

Number of friends was =224 ÷ 32 =7

Present number of friends =7 + 1 = 8

Therefore, 8 number of friends are their in the group.

I think it will help you ☺️☺️