In an engineering class that contained 25 students, the final exam consisted of 2 questions. Three fifths of the students answered the first question correctly. If four fifths of the remainder answered the second question correctly, how many students answered both questions incorrectly?	Pick.
A) 2 B) 6 C) 10 D) 12 E) 24
1st Question : Three fifths of the students answered the first question correctly - so 3/5âˆ—25=15   2nd Question : four fifths of the remainder answered the second question correctly so 4/5âˆ—(25âˆ’15)=4/5âˆ—10=8   total students who answered at least one Q correct =15+8= 
<gadget id="calculator">15+8</gadget>
<output>23</output>
23   so students who answered BOTH incorrectly= 25âˆ’23=2   2NSWER:2
<result>A</result>
In an engineering class that contained 25 students, the final exam consisted of 2 questions. Three fifths of the students answered the first question correctly. If four fifths of the remainder answered the second question correctly, how many students answered both questions incorrectly?