Q:

Which of the following interchange of numbers and mathematical signs would make the given equation correct?
72 ÷ 8 × 9 − 36 + 20 = 80

• 1
  20 and 80, × and +
• 2
  9 and 36, × and ÷
• 3
  36 and 72, ÷ and −
• 4
  8 and 9, + and −