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Mathematics 6 Online
OpenStudy (anonymous):

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

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.

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.

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

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

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

OpenStudy (jim766):

ugh, I am sorry, I wont be any help with this...

OpenStudy (anonymous):

:(

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