Set A of 8 positive integers may have the same element and have 35. And set B of 8 positive integers must have different elements and have 35. When m and n are the greatest possible differences between 35 and other elements’ sums in set A and set B, respectively, m-n=? Choose the correct option
A) 20 B) 26 C) 23 D) 25 E) 21
This is maximum-minimum. Hence, 35-(1+1+1+1+1+1+1)=28 and   35-(1+2+3+4+5+6+7)= 
<gadget id="calculator">  35-(1+2+3+4+5+6+7)</gadget>
<output>7</output>
7. So, 28-7=21. The correct answer is 21.
<result>E</result>
Set A of 8 positive integers may have the same element and have 35. And set B of 8 positive integers must have different elements and have 35. When m and n are the greatest possible differences between 35 and other elements’ sums in set A and set B, respectively, m-n=?