Sainik School Entrance Exam 2021 Solved Paper

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Question : 3 of 150

Marks: +1, -0

What should be added to

-{7}/{3}

to get

{3}/{7}

?

${21}/{58}$
${58}/{21}$
${47}/{21}$
${50}/{21}$

Solution:

(b) Let we should add

x

to

-{7}/{3}

to get

{3}/{7}.

-{7}/{3}+x={3}/{7} .

⇒ x={3}/{7}+{7}/{3}={9+49}/{21}={58}/{21}.

So, we should add

{58}/{21}

.

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