Three people each took 5 tests. If the ranges of their scores in the 5 practice tests were 15, 25 and 30, what is the minimum possible range in scores of the three test-takers?
Choose the correct choice from the following answers:
A) 25	B) 30	C) 35	D) 15	E) 10
I simply looked at the 3 different possible scores for each individual test: 15,30,25   We have to find the minimum range:    30-15= 
<gadget id="calculator"> 30-15</gadget>
<output>15</output>
15   30-25= 
<gadget id="calculator">30-25</gadget>
<output>5</output>
5   25-15= 
<gadget id="calculator">25-15</gadget>
<output>10</output>
10   The find the minimum range, you have to make the set of the 5 scores as small as possible.   Which means that 4 of the 5 scores of each individual person is zero.   5*5= 
<gadget id="calculator">5*5</gadget>
<output>25</output>
25.   25nswer:25
<result>A</result>
Three people each took 5 tests. If the ranges of their scores in the 5 practice tests were 15, 25 and 30, what is the minimum possible range in scores of the three test-takers?