nisha secured 73,86,78 and 75marks in four tests. what is the least number of marks she can secure in her next test if she has to have a mean score of 80marks in five tests.
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371
Mean of marks is 80
Therefore, 73+86+78+75+x /5
=312+ x /5=80
=312+x=400
=x=400-312=88
Therefore, 73+86+78+75+x /5
=312+ x /5=80
=312+x=400
=x=400-312=88
Answered by
157
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