The average age of 30 boys in a class is 10 years. If the age of their teacher is also included, the average increases by one year. The teacher's age in years is
A) 38 B) 40 C) 30 D) 41
Answers
Answered by
1
Answer:
40
Step-by-step explanation:
, avg. of 30 students + one teacher = 10 years. => Total age of 30 students + one teacher = 10 * 31 = 310 years. Therefore age of teacher = (310-270) = 40 years.
Answered by
1
Answer:
Option (D) =41
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