Geometry

Question Analysis
This question focuses on applying the combination formula for repetitive selection.
The main task is to correctly substitute the values of (number of toy types) and (number of toys to be bought) into the formula to find the number of combinations.

Key Concept Explanation
The formula is used when we can choose items from types of items with repetition allowed, and the order of selection doesn't matter. Here, and .

Step - by - Step Solution
Find the factorials:

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