How many combinations with repetition are allowed if n = 4 and r = 3

a. 20
b. 10
c. 27
d. 9
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astha8579 4 months ago
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The number of combinations with repetition that are allowed if n = 4 and r = 3 is given by: Option A: 20

How many k-element combinations of n objects, with repetition can be formed?

The number of  k-element combinations of n objects, with repetition is:

For this case, we're given that:

  • n = 4
  • k = 3 (the question uses the notation 'r' instead of 'k')

Thus, we get:

Thus, the number of combinations with repetition that are allowed if n = 4 and r = 3 is given by: Option A: 20

Learn more about combinations here:

https://brainacademy.pro/question/11958814

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