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Find sumf(i)d(i) in the following cases ...

Find `sumf_(i)d_(i)` in the following cases :
(i) `bar(d)=1.08,sumf_(i)=100` (ii) `bar(d)=1.2,sumf_(i)=15`

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The correct Answer is:
(i) `sumf_(i)d_(i)=sumf_(i)xxbar(d)=100xx1.08=108`
`sumf_(i)d_(i)=sumf_(i)xxbar(d)=15xx1.2=18`
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-STATISTICS-EXAMPLES FOR PRACTICE (MCQs)
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  19. Find the mean of the data given in the following table. {:("Class",0...

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