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Suppose Anil's mother wants to give 5 whole fruits to Anil from a basket of 7 red apples, 5 white apples and 8 oranges. If in the selected 5 fruits, at least 2 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 5 fruits to Anil is _____.
Correct Answer: 6860
We need to find the number of ways to select 5 fruits from 7 red apples, 5 white apples, and 8 oranges, with at least 2 oranges, at least 1 red apple, and at least 1 white apple.
Let $$r$$, $$w$$, and $$o$$ be the number of red apples, white apples, and oranges respectively. We need:
The possible cases are:
Case 1: $$o = 2$$, $$r + w = 3$$ with $$r \geq 1, w \geq 1$$.
Possible: $$(r, w) \in \{(1, 2), (2, 1)\}$$
Case 2: $$o = 3$$, $$r + w = 2$$ with $$r \geq 1, w \geq 1$$.
Only $$(r, w) = (1, 1)$$:
$$1960 + 2940 + 1960 = 6860$$
The correct answer is $$6860$$.
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