Suppose Anil's mother wants to give 5 whole fruits to Anil from a basket of 7 red apples, 5 white apples and…
Suppose Anil's mother wants to give whole fruits to Anil from a basket of red apples, white apples and oranges. If in the selected fruits, at least orange, at least one red apple and at least one white apple must be given, then the number of ways, Anil's mother can offer fruits to Anil is _____ .
Solution
We have,
$7$ Red apples $(RA)$
$5$ white apples $(WA)$
$8$ oranges $(O)$
Now, for offering $5$ fruits to be selected
Possible selections :- $(2O, 1RA, 2WA)$ or $(2O, 2RA, 1WA)$, or $(3O, 1RA, 1WA)$
Required number of ways
$= \binom{8}{2} \binom{7}{1} \binom{5}{2} + \binom{8}{2} \binom{7}{2} \binom{5}{1} + \binom{8}{3} \binom{7}{1} \binom{5}{1}$
$= 1960 + 2940 + 1960$
$= 6860$