Correct Answer: × and ÷

Solution : Given:
15 + 5 ÷ 2 – 9 × 3 = 22

Let's check the options –
First option: + and –
On interchanging the mathematical signs, we get –
= 15 – 5 ÷ 2 + 9 × 3
= 15 – 2.5 + 9 × 3
= 15 – 2.5 + 27
= 39.5 ≠ 22
Second option: × and ÷
On interchanging the mathematical signs, we get –
= 15 + 5 × 2 – 9 ÷ 3
= 15 + 5 × 2 – 3
= 15 + 10 – 3
= 22
Third option: × and –
On interchanging the mathematical signs, we get –
= 15 + 5 ÷ 2 × 9 – 3
= 15 + 2.5 × 9 – 3
= 15 + 22.5 – 3
= 34.5 ≠ 22
Fourth option: ÷ and +
On interchanging the mathematical signs, we get –
= 15 ÷ 5 + 2 – 9 × 3
= 3 + 2 – 9 × 3
= 3 + 2 – 27
= –22 ≠ 22

Here, only the second option satisfies the R.H.S. of the given equation. Hence, the second option is correct.