Correct Answer: + and –

Solution : Given:
272 ÷ 17 – 196 ÷ (5 × 3 + 1) = 30

Replace the given symbols in the options one by one with the original symbols in the given equation.
First option: × and –
Solving the L.H.S. of the equation –
= 272 ÷ 17 × 196 ÷ (5 – 3 + 1)
= 16 × 196 ÷ 3
= 16 × 65.34
= 1045.34 ≠ 30
Second option: × and +
Solving the L.H.S. of the equation –
= 272 ÷ 17 – 196 ÷ (5 + 3 × 1)
= 16 – 196 ÷ 8
= –8.5 ≠ 30
Third option: + and ÷
Solving the L.H.S. of the equation –
= 272 + 17 – 196 + (5 × 3 ÷ 1)
= 289 – 181
= 108 ≠ 30
Fourth option: + and –
Solving the L.H.S. of the equation –
= 272 ÷ 17 + 196 ÷ (5 × 3 – 1)
= 16 + 14
= 30 = R.H.S.

So, only the fourth option satisfies the R.H.S. of the given equation. Hence, the fourth option is correct.