Tough and Tricky questions: Combinations.
Three students - 2 boys and 1 girls - are to sit side by side for a makeup exam. How many ways could they arrange themselves given that no two boys and no two girls can sit next to one another? Choose one
A) 2
B) 4
C) 72
D) 240
E) 720
2!*1!*2 = 2*1*2= 
<gadget id="calculator">2*1*2</gadget>
<output>4</output>
4 ways.   Ans. 4) 4
<result>B</result>
Tough and Tricky questions: Combinations.
Three students - 2 boys and 1 girls - are to sit side by side for a makeup exam. How many ways could they arrange themselves given that no two boys and no two girls can sit next to one another?