What will come in the place of the question mark (?) in the following equation, if +' and '-' are interchanged and '×' and ‘÷’ are interchanged?
162 × 9 – 452 + 7 ÷ 9=?

Given:
162 × 9 – 452 + 7 ÷ 9=?
Following BODMAS:
As per the question after putting the sings we get following equations-
162 ÷ 9 + 452 - 7 × 9 =?

18 + 452 - 7 × 9 =?

18 + 452 - 63 =?

470 - 63 =?

? = 407
Correct answer is (b).