Mean of 100 numbers was found to be 50. But later on, it was observed that one of the number 150 was wrongly taken as 50. The correct mean is:
49
51
52
50
Answers
Answer:
answer is 51.
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Given : Mean of 100 numbers was found to be 50. But later on, it was observed that one of the number 150 was wrongly taken as 50.
To Find : The correct mean
Solution:
Mean of 100 numbers was found to be 50
Mean = Total / Number
=> 50 = Total / 100
=> Total = 5000
it was observed that one of the number 150 was wrongly taken as 50
Hence 50 has to be subtracted from total and 150 to be added
=> Correct total = 5000 - 50 + 150
= 5100
Correct Mean = 5100/100
= 51
Correct Mean = 51
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