the mean of the ages of 10 students of class 7 is 14 years, what was the mean age of the samegroup of students two years back?
Answers
Answered by
1
Answer:
12 years..................
Answered by
6
Answer:
12
Step-by-step explanation:
present total age of 10 students
= 10 × 14 = 140
2 years ago ,total age of 10 students was = 140 - 10×2 = 120
mean = 120 /10 = 12 Answer
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