Correct Answer - Option 4 : × and ÷
1) ÷ and –
Given expression: 86 + 5 - 42 ÷ 28 × 14 = 7
After replacing the symbols, we get:
L.H.S = 86 + 5 ÷ 42 - 28 × 14
= 86 + 0.12 - 392
= 86.12 - 392
=> -305.88 ≠ R.H.S
2) × and +
Given expression: 86 + 5 - 42 ÷ 28 × 14 = 7
After replacing the symbols, we get:
L.H.S = 86 × 5 - 42 ÷ 28 + 14
= 430 - 1.5 + 14
= 444 - 1.5
= 442.5 ≠ R.H.S
3) × and -
Given expression: 86 + 5 - 42 ÷ 28 × 14 = 7
After replacing the symbols, we get:
L.H.S = 86 + 5 × 42 ÷ 28 - 14
= 86 + 7.5 - 14
= 93.5 - 14
= 79.5 ≠ R.H.S
4) × and ÷
Given expression: 86 + 5 - 42 ÷ 28 × 14 = 7
After replacing the symbols, we get:
L.H.S = 86 + 5 - 42 × 28 ÷ 14
= 86 + 5 - 84
= 91 - 84
= 7 = R.H.S
Hence, '× and ÷ ' is the correct answer.
