8. The ratio of Lisa's stamps to Jennie's stamps to Rose's stamps is 2:3:7 Rose has 105 more stamps than Lisa.How many stamps do the three children have altogether? a. 42 b. 63 C. 147 d. 315 9. There are 10 apples 1 melon and 3 watermelon in basket . What is the ratio of the number watermelon to the number of apples to the number of melon? a. 10:1:3 b. 3:1:10 C. 3:10:1 d. 1:3:10 10. In plantation, the ratio of the number of mango trees to the number of durian trees to the number of rambutan trees is 5:12:7 There are 60 more rambutan trees than mango trees. How many rambutan tree are there? a. 144 b. 150 C. 210 d. 360

8. **d. 315**Rose has 7 parts and Lisa has 2 parts. The difference is 5 parts, which equals 105 stamps. Therefore, one part is 105/5 = 21 stamps. The total number of stamps is (2+3+7) * 21 = 315 stamps.9. **c. 3:10:1**The ratio is simply the number of watermelons (3) : the number of apples (10) : the number of melons (1).10. **c. 210**The difference between the number of rambutan trees (7 parts) and mango trees (5 parts) is 2 parts, which equals 60 trees. Therefore, one part is 60/2 = 30 trees. The number of rambutan trees is 7 * 30 = 210 trees.