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
Answers
Given : Average age of a group of 10 students is 12 years.
5 new students join them, then the average age of the group increases by 1 year.
To Find : The average age of the new students is
A) 13 years
B) 15 years
C) 16 years
D) 18 years
Solution:
Average age of a group of 10 students is 12 years.
=> Total age of 10 Students = 10 * 12 = 120 years
5 new students join them
Total students = 10 + 5 = 15
Average age increase by 1 years
Hence new average age = 12 + 1 = 13 years
Total age = 15 x 13 = 195 year
Age of 5 new students = 195 - 120 = 75 years
Average Age of 5 new students = 75/5 = 15 years
The average age of the new students is 15 years
Learn More:
After settlement, the average weekly wage in a factory had ...
brainly.in/question/19026105
The average age of 21 boys is 29 years. When one boy leaves the ...
brainly.in/question/12311625
Here is your answer...
Option B which is 15 years is the correct answer.
HOPE IT WILL HELP YOU.