DRDO Multi tasking staff Model paper 8

Upon interchanging:
1) 5 and 4 → 57 × 3 ÷ 2 + 14 = 99.5
2) 7 and 5 → 45 × 3 ÷ 2 + 17 = 84.5
3) 7 and 2 → 42 × 3 ÷ 7 + 15 = 33
4) 3 and 4 → 37 × 4 ÷ 2 + 15 = 89
By interchanging 7 and 5 the equation will be correct.