There are three different types of note book in a bin. 100 type A, 100 type B, 100 type C. How many different way I can pick 3 notebook one of each. ( where order does not matter.)
I did this way
(300)(200)(100)/ (100*100*100)= 6 But the answer is 10.
can anybody help me?
we have 100 books in each type. (i.e) Type A,Type B,Type C.
If each book is different from other books Then each type has $100$ different books. I am going to choose one book from each type (and by your given data order of the chosen books is not a matter). The total number of possibilities = $100*100*100=1000000$
If all the books in type A,B and C is identical
Then choosing any book in Type A yields the same book due to identical. I am going to choose one book from each type (and by your given data order of the chosen books is not a matter) The total number of possiblities=$1*1*1=1$.