GATE CS 2025 Set 1 — Question 10
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Engineering Mathematics → Quantitative Aptitude → Permutations & Combinations
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Question
A shop has 4 distinct flavors of ice-cream. One can purchase any number of scoops of any flavor. The order in which the scoops are purchased is inconsequential.
If one wants to purchase 3 scoops of ice-cream, in how many ways can one make that purchase?
If one wants to purchase 3 scoops of ice-cream, in how many ways can one make that purchase?
Correct answer
(B) 20
Solution
This is a problem of combinations with repetition (stars and bars). We want to choose scoops from flavors.The formula is:Calculation:Thus, there are 20 ways.
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