Given below are the ages of 25 students of class VII in a school. Find the arithmetic mean of their ages.
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Answer:
13.48
Step-by-step explanation:
Total ages of the 25 students
= (12×8) + (13×5) + (14×4) + (15×8)
= 96 + 65 + 56 + 120
= 337
Therefore ,
Mean of their ages
= 337÷25
= 13.48
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