A pizza shop offers the topping shown below. How many three toppings pizzas can you make.
pepperoni
mushrooms
sausage
onion
ham
6
10
4
5
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OpenStudy (rulnick):
It's 5-choose-3. Do you know how to compute that?
OpenStudy (anonymous):
no
OpenStudy (rulnick):
5! / (3! (5-3)!)
OpenStudy (anonymous):
6?
OpenStudy (rulnick):
... which equals 5! / (3! 2!). Know how to find that?
Hint: 5! = 5 times 4 times 3 times 2 times 1.
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OpenStudy (rulnick):
No, not 6.
OpenStudy (anonymous):
120
OpenStudy (anonymous):
5
OpenStudy (anonymous):
@rulnick
OpenStudy (rulnick):
The numerator is 120, you are right. And this is divided by (3!2!) or 12.
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OpenStudy (anonymous):
10 @rulnick
OpenStudy (rulnick):
Right!
OpenStudy (anonymous):
:) thank you so much for helping me understand :)
OpenStudy (rulnick):
welcome
OpenStudy (anonymous):
i have more
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OpenStudy (anonymous):
@rulnick
OpenStudy (anonymous):
@Jim766
OpenStudy (anonymous):
can you help?
OpenStudy (jim766):
sorry, I am not the greatest with these...are they like the one above?
OpenStudy (anonymous):
sort of. its all based on proabilityl
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OpenStudy (jim766):
lets see what you got
OpenStudy (anonymous):
okay
OpenStudy (anonymous):
a bag contains 2 white marbels and 7 purple marbels. Two marbles are shown at random.One marble is not replaced
OpenStudy (anonymous):
then a second marbel is drawn.
What is the proability of selecting a purple marble and then a white marble .?
What is the proability of selecting two white marbles.
Is thre a greater chance of selecting two white marbles in a row or two puple marbles in a row . Show your work ,
OpenStudy (anonymous):
@Jim766
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