The mean age of 30 students in a class is 15 years. It was later observed that while calculating the mean, the ages of three students were wrongly taken as 12, 14 and 16 years instead of 13, 15 and 17 years. Find the correct mean age.
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the answer is 15.1 years
Step-by-step explanation:
15=x/30
x=30×15
x=450
but 3 is added to 450 as ages were taken wrong
now..
453/30=15.1
therefore correct mean age is 15.1 years
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