2. At least 56+75- 100=3 1 person, and at most 56 people.

3, 25+26+24-16-14-15+5 = 35 people.

4.40% * 2/5 * x+40% * 3/4 * x-40% x =12x = 200 people.

5, 48+37+39-52*2=20 people

6385 The simplest true score is 240, and the sum of true scores is 120.

Solution 385=5*7* 1 1, number of simplest truth scores =4*6* 10=240, minimum simplest truth score+maximum simplest truth score = 1, and so on, and the sum is/kloc-0.