Question

14) Average age of a group of 10 students is 12 years. If
5 new students join them, then the average age of the
group increases by 1 year. The average age of the new
students is
A) 13 years
B) 15 years
C) 16 years
D) 18 years​

Answer 1

Answer:

18 years

Step-by-step explanation:

Answer 2

Sol. 10×20= 120

5 new students added and the average increases by 1

then Number of New students added is 5

Therefore total number of students is 15

then 15×13= 195

so 195-120= 75

75/5 = 15 years