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secondary 4 | A Maths
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Pls help me with this question it’s about permutation, computing and combination! If you guys know pls help me ASAP! (:
Date Posted: 6 years ago
Views: 418
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The 24 ways you got here is just the number of ways the 4 groups (subjects) can be arranged on the shelf.
But for each of these 24 ways, within each subject the books can be further permuted.
Hence the total number of ways
= 24 x 4! x 3! x 2!
= 6921
But for each of these 24 ways, within each subject the books can be further permuted.
Hence the total number of ways
= 24 x 4! x 3! x 2!
= 6921
Oh, how careless of me! Thank you!
You are welcome.. :)
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