rhe mean age of 30 student is 9yr if the age of their teacher is included then mean becomes 10yr the age of teacher is ?
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total age of 30 students is=9*30=270yrs
total age of 31 students is=10*31=310yrs
so ur answer is 310-270=40yrs
plz mark brainliest
total age of 31 students is=10*31=310yrs
so ur answer is 310-270=40yrs
plz mark brainliest
Answered by
2
Answer:
Step-by-step explanation:
40 year
Answered by
2
Answer:
Step-by-step explanation:
40 year
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