Answers Combination With Repetition Calculator

How many 4 scoop combinations can you make from 6 flavours if repeats are allowed?

This is combination with repetition because order does not matter, but the same flavour can be chosen more than once.

Exact result

126

6 choose 4 with repeats allowed is 126.

A bowl can repeat flavours, but rearranging the same 4 scoops does not create a new combination. For example, vanilla-vanilla-mango-pear is the same bowl no matter how you list the scoops.

Worked steps

Show your work

  1. Inputs: n = 6, r = 4
  2. Formula: C(n + r - 1, r) = (n + r - 1)! / (r!(n-1)!)
  3. Substitute: C(6 + 4 - 1, 4) = (6 + 4 - 1)! / (4!(6-1)!)
  4. Steps: 362,880 / (24 x 120)
  5. Result: 6 choose 4 with repeats allowed is 126.

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A bowl can repeat flavours, but rearranging the same 4 scoops does not create a new combination. For example, vanilla-vanilla-mango-pear is the same bowl no matter how you list the scoops.

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