stats hw

[farmerehsan 10+ year member]

i kno car audio forum, not for math thought i give it a shot i kno they are some smart ***** out there

1. A basketball player has made 70% of his fouls shots during the season. If he shoots 3 fouls shots in tonight's game, what is the probability that he doesnt make all of those shots?

2.you roll a fair die 3 times. What is the probability that you roll at least one 2?

3.At a california college, 22% of the students speak spanish, 5% speak french, and 3 speak both languages. What is the probablity that a student choosen at radnom from the college speaks spanish but not french?

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[srorobs 10+ year member]

pretty sure first one is .3 x .3 x .3 = .027 = 2.7%

 

[DownSouth954 10+ year member]

I had an A in Stats a couple semesters ago yet I forget how to do these lol...

 

[srorobs 10+ year member]

and i think the second one is (1/6) + (1/6) + (1/6) = .5

 

[mattf 5,000+ posts]

Wouldn't the third one be 22%? Since 22% of the students spanish only.

The first one is .5*.5*.5 = .125 or 12.5%.

And I think the second one is 1.6*1/6*1/6, not adding them.