The average age of a class of 39 students is 15 years. If the age of the teacher be included, then the average increases by 3 months. Find the average of the teacher.
(a) 25 yrs. (b) 24 yrs. (c) 27 yrs. (d) 28 yrs.
Question ID - 51412 | SaraNextGen Top Answer The average age of a class of 39 students is 15 years. If the age of the teacher be included, then the average increases by 3 months. Find the average of the teacher.
(a) 25 yrs. (b) 24 yrs. (c) 27 yrs. (d) 28 yrs.
The average age of a class of 39 students is 15 years. If the age of the teacher be included, then the average increases by 3 months. Find the average of the teacher.
(a) 25 yrs. (b) 24 yrs. (c) 27 yrs. (d) 28 yrs.
1 Answer
127 votes
Answer Key / Explanation : (a) -
Total age of 39 persons = (39×15)=585 yrs.
Average age of 40 persons = 15 yrs. 3 months = 
yrs.
Total age of 40 persons = 
610 yrs.
Age of the teacher = 
yrs.
127 votes
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127