"Emma has 5 French books, 6 English books and 4 Spanish books on her shelf. Find the probability that if she chooses four books at random, she will have at least one book of each language."

Seriously, if you can do this, I will love you forever. My brother- a 3rd Year engineering student who just did a course on probability, couldn't get it- but he has a tendency to overcomplicate. The answer should be 48/91- but the marking scheme just randomly multiplies everything for 4!/2! to get that and I have no idea why.

-Stella x

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