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Construction of index numbers - class-XI

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Laspeyre's index $= 110$, Paasche's index $= 108$, then Fisher's Ideal index is equal to: 

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A
$109$
💡 Explanation:

Laspeyre's Index $(L.I.)$ $= 110$

Paasche's Index $(P.I.)$ $= 108$

Fisher's Ideal Index $= \sqrt{L.I. \times P.I.}$
                                 $= \sqrt{110\times 108}$
                                 $=108.995 \approx 109$

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