If the average of 40 students is 10 years and after teacher come in class and the average of all is 12 what is age of teacher
Answers
Answered by
0
Answer:Here N= 10 mean = 10
Efx = N * 10
= 40 * 10
=400
When teacher comes
Total weight = 400 + teacher weight
Now avg wt= 12
Number = 40+ 1 =41
Total = 41* 11 = 400 + teacher weight
So teacher wt= 41 * 11 - 400 = 51
Step-by-step explanation:
gadgeyash:
it's wrong answer.
Similar questions