For an upcoming charity event, a male vocalist has agreed to sing 3 out of 8 “old songs” and 4 out of 7 “new songs.” How many ways can the singer make his selection? Choose the correct choice from the following answers:
A) 25  B) 50  C) 150  D) 147  E) 600
=8C6*7C4   =8*7/4*7*6/4   =7*7*3= 
<gadget id="calculator">7*7*3</gadget>
<output>147</output>
147   Ans= 147
<result>D</result>
For an upcoming charity event, a male vocalist has agreed to sing 3 out of 8 “old songs” and 4 out of 7 “new songs.” How many ways can the singer make his selection?