Stats Question


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I have an exam coming up soon, and im a bit worried, im not too sure how to do this question. I need help!

"One cartoon sticker is given away free inside the wrapper of every bar of Chocco. There are 6 different characters. Each bar is equally likely to contain any of the 6 characters...

Question..... (can do...)

... Peter has so far collected 4 different characters. Find the probability that, in order to complete the set, he needs to buy:

iv) exactly 2 more bars... (2 marks)

v) exactly 3 more bars... (4 marks)

vi) at least 4 more bars... (3 marks)

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iv) exactly 2 more bars... (2 marks)

v) exactly 3 more bars... (4 marks)

vi) at least 4 more bars... (3 marks)

:huh: Umm ... iv.33.333%

v. 50%

vi. 66.666%

:unsure: ???

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