The mean of marks obtained by 15 students is 63 . If marks of two students were read wrongly 73 instead of 78 and 59 instead of 56, find the correct mean.
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14
Answer:
The mean of marks obtained 15 students =63
2Students were read - 73 instead of 78 and 59 instead 69.
Marks obtained by 15 students=63*15
=945
=945+15
=960
The correct mean marks of 15 students =960/15
=64
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Answered by
3
Answer:
64
Step-by-step explanation:
Mean of the marks of 15 students= 63
By mistake marks of 2 students were readed as= 73 instead of 78, 59 instead of 69
Marks obtained by 15 students= 63*15
=945+15
=960
the correct mean marks of 15 students =960/15=64
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