What will come in the place of the question mark (?) in the following equation if '+' and '-' are interchanged and '×' and '÷' are interchanged?
6 + 15 × 5 - 4 ÷ 3 = ?
1
12
2
21
3
18
4
15
What will come in the place of the question mark (?) in the following equation if '+' and '-' are interchanged and '×' and '÷' are interchanged?
6 + 15 × 5 - 4 ÷ 3 = ?