Geometry

Question Analysis
This question focuses on applying the combination formula for repetitive selection.
The main focus is on correctly substituting the values of (number of stationery types) and (number of stationery items 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
Calculate the factorials:

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