Question

the average age of a group of 8 persons was 14 years. A person with age 28 years left the group and a new person with age 16 years joined join the group. Find the new average age of group.
1. 13 years
2. 14 years
3. 15.5 years
4. 12.5 years​

Answer 1

Answer:

4) 12.5

Step-by-step explanation:

sum of ages = 14 × 8 = 112 .A person with age 28 years left the group...& A person joined with age 16 years...so new sum of ages = 112 - 28 + 16 = 100...New average of group = 100 ÷ 8 = 12.5