1. **State the problem:** Encik Zamarul wants to buy 2 adult tickets. Each ticket price ratio for children to adults is 3:5, and the child ticket price is RM 90. 2. **Find the price of one adult ticket:** Given the ratio of child to adult ticket prices is $3:5$, and child ticket price is RM 90. Use the ratio to find adult ticket price: $$\text{Adult price} = 90 \times \frac{5}{3} = 150$$ 3. **Calculate total cost for 2 adult tickets:** $$2 \times 150 = 300$$ 4. **Compare total cost with available money:** Encik Zamarul has RM 350. Since $$300 \leq 350$$, the money is sufficient. **Final answer:** Encik Zamarul's money is sufficient to buy 2 adult tickets.