22. The average age of a class of 40 students is 18 yr.
When the teachers age is also included to
calculate the average age becomes 19 yr. What
is the teacher's age?
(b) 69 yr
(d) 39 yr
(a) 59 yr
(c) 49 yr
Answers
Answered by
2
Answer:
59 yr
Step-by-step explanation:
total age of 40 students is 40*18 = 720
When teacher age is also include means total 41 members and average age is 41*19 = 779
teacher age is 720-779 = 59 yr
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rasesh5:
Nice
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