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Properties of Determinants

In a row of g...

Question

In a row of girls if Sheetal who is 10th from left and Hina is 9th from right change their seats, Sheetal becomes 15th from the left How many girls are there in the row?

A

16

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B

32

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C

25

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D

23

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Solution

The correct option is D $23$
After changing their seats Sheetal became $15 t h$ from the left and $9 t h$ from the right
So there are $(15 + 9 - 1)$ girls i.e. $23$ girls in the row

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