Ratio and Proportion

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Question : 6 of 112

Marks: +1, -0

If

a b=1

then

\;{1+a}/{1+b}

is

$\;{a-1}/{b-1}$
$\;{1-b}/{a-1}$
$\;{a-1}/{1-b}$
$\;{1-a}/{1-b}$

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