Divide Each Problem Like It Is On The Paper And Then You Will Get The Answer To Each Question.
Answer:
qwhgydyhy I have to go toggggggffdggef ghht
If the 10 videotapes are distinct (different) and the order of selection is immaterial, then there are
C(10,3)=10!/(3!(10-3)!)=10!/(3!7!)=10*9*8/(1*2*3)=120
ways to select three videotapes out of 10.
I believe that the answer to the question would be 4.5
