Final answer:
After calculating both individual ticket prices and the family rate option for the Smith family cruise cost, the cheaper option is the family rate plus the cost of tickets for the four children under 15 years old, totaling $220.
Step-by-step explanation:
The question is about calculating the total cost for the Smith family to take a cruise. According to the pricing information provided, there are two rates that could apply to a family of two adults and four children under 15 years old: individual ticket prices or a family rate that covers two adults. We need to calculate both options and then determine the most cost-effective choice for the Smith family.
The individual prices would be $100 per adult and $25 per child under 15. The family rate is $120, which covers '2 ads', presumably meaning two adults, so additional rates for children would apply. If we calculate both options:
- Individual tickets: (2 adults x $100) + (4 children x $25) = $200 + $100 = $300
- Family rate: $120 (for two adults) + (4 children x $25) = $120 + $100 = $220
The family rate of $120 plus the individual child tickets costing $25 each is the cheaper option, totaling $220.