9. The mean height of 15 students is 154 cm.
It is discovered later on that while
calculating the mean, the reading 175 cm
was wrongly read as 145 cm. Find the
correct mean height.
Answers
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Step-by-step explanation:
Total height of 15 students = ∑x = 154×15
= 2310cm
It was found that 175cm was wrongly read as 145
Correct sum = 2310−145+175
= 2340cm
Correct mean = 2340/15
= 156cm
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