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Lara, Sara and Cara are good friends. They have a set of 12 cards each with one of the letters S, U, X, Y, E,
Lara, Sara and Cara are good friends. They have a set of 12 cards each with one of the letters S, U, X, Y, E, O, T, I, H, A, V, B on them. For the purpose of this question, a word is any sequence of letters, regardless as to whether it makes any sense as a word in the English language and a sentence is any combination of words, regardless of whether it is meaningful.
- First Lara randomly chooses one card. Then Sara randomly chooses 4 cards from the remaining cards. Then Cara randomly chooses 3 cards from the remaining cards. Each girl puts their letters together in random order to form a word. Then they put their words together to form a sentence, with Lara's word first, Sara's word second and Cara's word last. How many different outcomes of the sentence are possible?
- Compare the result obtained in (a) to P(12, 8) and argue if you expect the two to be the same or why you expect them to differ? (short answer suffices)
- What is the probability that the sentence resulting in (a) reads 'I love you'? What is the probability that the sentence resulting in (a) reads 'I hate you'?
- Instead of putting all three words together to form a sentence, the girls now randomly choose (for example by drawing sticks) one of their words and put that word on the table. How many different outcomes are possible?
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