दिए गए दो चिह्नों को आपस में बदलने पर, निम्नलिखित में से कौन सा समीकरण सही होगा? + और × I. 5 × 12 – 15 + 20 ÷ 30 = 7 II. 51 ÷ 17 × 9 + 10 – 8 = 85

If: 'A % B' means 'A is multiplied by B', 'A # B' means 'A is added to B', 'A @ B' means 'A is divided by B', and 'A $ B' means 'B is subtracted from A'; then what is the value of 15 @ 5 % 7 # 9 $ 4?

Which two numbers should be interchanged to make the given equation correct? 98 ÷ 3 + 25 × 7 - 18 = 71