A bag contains 3 identical red ball , 4 identical blue balls, 5 identicals green balls . The number of ways of selecting at least one ball from each color is
60
12
120
15
As we have learned
Theorem of Combinations -
The number of ways of selecting at least one objects of each kind from a collection of m objects of one kind, n objects of another kind and p objects of other kind is mnp.
In thies question,
Number of ways =
Study 40% syllabus and score up to 100% marks in JEE