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Problem 18 Medium Difficulty

Use the information at the left.
FIGURE CAN'T COPY
What is the probability that the first two of the eight coasters you ride are the Millennium Force and the Top Thrill Dragster? Suppose you chose to ride the two coasters at random.

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Top Algebra Educators
Catherine R.

Missouri State University

Heather Z.

Oregon State University

Alayna H.

McMaster University

Caleb E.

Baylor University

Video Transcript

All right. So we have picked out our coasters. We've got eight of them, and there's two that we won't arrive specifically. Doesn't tell us the order is important, so we're gonna definitely keep this as a combination of eight and choosing to. So how many possibilities is that? Well, that's gonna be eight times 7/2 times one. So this is 56/28. I'm sorry. Over to which equals 28. So we have 28 possible ways we could broad two coasters. Well, how many choices are there to ride the two we want? Well, we can either ride, uh, the millennium first or the dragster first, or you know. So there are two choices. So our probability then becomes too out of 28 or one and 14 chance that of the 18 we picked, those were the first to we ride

University of Louisville
Top Algebra Educators
Catherine R.

Missouri State University

Heather Z.

Oregon State University

Alayna H.

McMaster University

Caleb E.

Baylor University