The teacher took 4 1 students to go boating in the park. Please design the cheapest charter scheme. There are 4 people in 6 yuan by boat and 3 people in 5 yuan by boat.

At full capacity, the average per capita of large ships is 3/2 yuan, and the average per capita of small boats is 5/3 yuan. Big ships are very cheap.

Strategy: Try to use a big ship with few empty seats.

Number of ships (total number of people)-Number of boats (total number of people)-Total rent

10 (40 persons)-1 (1 person) -65 yuan.

9 (36 persons) -2 (5 persons) -64 yuan.

8 (32 persons) -3 (9 persons) -63 yuan.

It got worse after that.

Best Scheme: Rent 8 big boats and 3 small boats, and the total rent is 63 yuan.