Faces of a dice

An ordinary cubical dice having six faces marked with alphabets A,B,C,D,E, and F is thrown 15 times and the list of 15 alphabets showing up are noted. Find the number of ways in which among the alphabets A,B,C,D,E, and F only three of them appear in the list.

Do like and share.
×

Problem Loading...

Note Loading...

Set Loading...