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What will come in the place of the question mark (?) in the following equation if ‘+' and ‘–' are interchanged and also ‘×’ and ‘÷’ are interchanged?2
Question

What will come in the place of the question mark (?) in the following equation if ‘+' and ‘–' are interchanged and also ‘×’ and ‘÷’ are interchanged?
28 – 168 × 4 + 10 ÷ 2 =?

A.

30

B.

40

C.

50

D.

25

Correct option is C

Given: 
28 – 168 × 4 + 10 ÷ 2 =?
if ‘+' and ‘–' are interchanged and also ‘×’ and ‘÷’ are interchanged
then, modified equation will become:
=28 + 168 ÷ 4 - 10 × 2 
=28 + 42 - 10× 2
=28 + 42 - 20
=70 - 20
=50
Thus, Option C is the correct answer.

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