If the average age of group of 5 students is 15. One new student joine

1.	If the average age of group of 5 students is 15. One new student joined the group, then average is increased by 1. Find the age of new student.1. 162. 153. 214. 20
Answer» Correct Answer - Option 3 : 21 Given: Average age of 5 students = 15 The average increase by 1 when one new student join the group Formula used: Sum of ages = Average × Number of persons Calculation: Sum of ages of 5 students = (15 × 5) years ⇒ 75 years New average after a new student joined the group = (15 + 1) ⇒ 16 Sum of ages of 6 students including new joinee = (16 × 6) years ⇒ 96 years Age of new student = (96 – 75) years ⇒ 21 years ∴ The age of new student is 21 years

If the average age of group of 5 students is 15. One new student joined the group, then average is increased by 1. Find the age of new student.1. 162. 153. 214. 20

Answer» Correct Answer - Option 3 : 21

Given:

Average age of 5 students = 15

The average increase by 1 when one new student join the group

Formula used:

Sum of ages = Average × Number of persons

Calculation:

Sum of ages of 5 students = (15 × 5) years

⇒ 75 years

New average after a new student joined the group = (15 + 1)

⇒ 16

Sum of ages of 6 students including new joinee = (16 × 6) years

⇒ 96 years

Age of new student = (96 – 75) years

⇒ 21 years

∴ The age of new student is 21 years

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If the average age of group of 5 students is 15. One new student joined the group, then average is increased by 1. Find the age of new student.1. 162. 153. 214. 20

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