A group of boy scouts and girls scouts is going on a rafting trip. 45% of the scouts arrived with signed permission slips. If 60% of the scouts were boy scouts and 25% of the boy scouts arrived with signed permission slips, then what percentage of the scouts were girl scouts who arrived with signed permission slips?
Answers.
A) 20  B) 21  C) 25  D) 28  E) 30
We don't know how many scouts went on the trip, so let's assume 100 scouts went on the trip   60% were boy scouts so 60% of 100 = 60 were boy scouts   25% of the boy scouts brought their permission slips signed, so  .25*60= 
<gadget id="calculator"> .25*60</gadget>
<output>15</output>
15 boy scouts had signed slips    60-15= 
<gadget id="calculator"> 60-15</gadget>
<output>45</output>
45 boy scouts did not   45% of all the scouts had signed slips, so  .45*100= 
<gadget id="calculator"> .45*100</gadget>
<output>45</output>
45 in total had signed slips   thus  45 - 15= 
<gadget id="calculator"> 45 - 15</gadget>
<output>30</output>
30 girl scouts had signed slips   thus the percentage of scouts who were girl scouts arriving with signed permission slips is  30/100= 
<gadget id="calculator"> 30/100</gadget>
<output>3/10 = around 0.3</output>
.30= 30%   30
<result>E</result>
A group of boy scouts and girls scouts is going on a rafting trip. 45% of the scouts arrived with signed permission slips. If 60% of the scouts were boy scouts and 25% of the boy scouts arrived with signed permission slips, then what percentage of the scouts were girl scouts who arrived with signed permission slips?