What will come in place of the question mark (?) in the following equation, if ‘+’ and ‘÷’ are interchanged and ‘−’ and ‘×’ are interchanged?
15 − 3 ÷ 21 + 3 × 36 = ?

Correct option is C

Given:
15 − 3 ÷ 21 + 3 × 36 = ?
If ‘+’ and ‘÷’ are interchanged and ‘−’ and ‘×’ are interchanged.
The equation becomes:
15 × 3 + 21 ÷ 3 − 36
15 × 3 + 7 − 36
45 + 7 − 36
52 − 36
16

Option C is correct.