Correct Answer - Option 4 : ÷ and ×
Checking each option one by one:
Given equation: 8 + 6 ÷ 3 - 8 × 4 = 24
1) - and ×
8 + 6 ÷ 3 × 8 - 4
= 8 + 2 × 8 - 4
= 8 + 16 - 4
= 20 ≠ R.H.S.
2) + and ÷
8 ÷ 6 + 3 - 8 × 4
= 1.33 + 3 - 32
= -27.67 ≠ R.H.S.
3) + and -
8 - 6 ÷ 3 + 8 × 4
= 8 - 2 + 32
= 38 ≠ R.H.S.
4) ÷ and ×
8 + 6 × 3 - 8 ÷ 4
= 8 + 18 - 2
= 24 = R.H.S
Hence, "÷ and ×" is the correct answer.