6 persons a, b, c, d, e, and f are to be lined up in a row. If a, b, and c adhere always together, how many possible cases are there?
Select:	A) 24	B) 36	C) 48	D) 72	E) 144
There are 6 peoples. 3 have to be together, so take them as 1..   Now total= these 3 + 1+1+1= 4 total..   4 can be arranged in 4! ways..   now these 3 together can be arranged in 3! ways, so TOTAL ways= 4!*3!= 24*6= 
<gadget id="calculator">24*6</gadget>
<output>144</output>
144   ANSW144R:144
<result>E</result>
6 persons a, b, c, d, e, and f are to be lined up in a row. If a, b, and c adhere always together, how many possible cases are there?