(i) Find the mean of their marks
(ii) Find the mean of their marks when the marks of each student are increased by 2
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Mean = (Sum of marks)/No. of students
Mean(when marks are increased by2)=Earlier mean +2
Put all the values and you will be able to find it by yourself
Mean(when marks are increased by2)=Earlier mean +2
Put all the values and you will be able to find it by yourself
8171402510:
Height of cuboid=(5*5*5)/(2.5*2.5) =20 cm
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