One person does not participate in ball distribution, and the extra Y ball is distributed to x- 1. Everyone can be divided into two, then y>2 (x-1); If everyone scores more than 3 points, then y
And x*y=200 1.
therefore
x * 2 *(x- 1)& lt； 200 1, because x is an integer, x
Similarly, x*3*(x- 1)>200 1, x & gt25.
Since 200 1=3*23*29 and X and Y must be integers, X = 29 and Y = 69.
There are 29 people, each with 69 goals.
Two, five thirds
3/2
13/8
8/5
5/3-3/5= 16/ 15
3/2-2/3=5/6
13/8-8/ 13= 105/ 104
8/5-5/8=39/40
Obviously, if Xiaoming regards 5/3 as 3/5, then the change of sum is the largest, minus 16/ 15.
The average decreased (1615) ÷ 4 = 4/15.
Three. Total cost: 52,000 * 0.98+1840 = 52,800 yuan.
The total planned income is: 52,800 * (1+17%) = 61.776 yuan.
Excluding the loss, the actual apple sold is: 52,000 * (1-1%) = 51480 kg.
The price per kilogram of apples is: 61776 ÷ 51480 =1.2 yuan/kg.
4. Let the water consumption of Party A and Party B exceeding 4 tons be X and Y..
The water consumption of Party A is X+4 tons, and that of Party B is Y+4 tons.
(4 * 1.8+X * 3)+(4 * 1.8+Y * 3)= 26.4
(X+4):(Y+4)=5:3
simplify
3X+3Y= 12
3X-5Y=8
subtraction
8Y=4, Y=0.5 tons, and X=3.5 can be obtained by substituting into one of the equations.
The water fee payable by Party A is: 4* 1.8+3.5*3= 17.7 yuan.
The water fee payable by Party B is: 4* 1.8+0.5*3=8.7 yuan.