OpenStax, Algebra and Trigonometry 2e §13.5 Counting Principles · Exercise 47 · Combinatorics · Permutations & combinations
Counting Principles · Exercise 47
A family consisting of 2 parents and 3 children is to pose for a picture with 2 family members in the front and 3 in the back.
ⓐHow many arrangements are possible with no restrictions?
ⓑHow many arrangements are possible if the parents must sit in the front?
ⓒHow many arrangements are possible if the parents must be next to each other?
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Algebra and Trigonometry 2e · §13.5 Counting Principles · Exercise 47
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