Which two signs should be interchanged in the following equation to make it correct?
6 + 7 × 8 - 21 ÷ 7 = 47
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. + and ×
Given equation: 6 + 7 × 8 - 21 ÷ 7 = 47
After interchanging the signs:
6 × 7 + 8 - (21 ÷ 7) = 47
⇒ (6 × 7) + 8 - 3 = 47
⇒ (42 + 8) - 3 = 47