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Mathematics 10 Online
OpenStudy (anonymous):

Mario likes to eat at a local restaurant but he has difficulty choosing his meal as he likes 6 main courses equally and there are two desserts he loves. He decides to roll a die to choose his main course and flip a coin to decide his dessert. He assigns the meal this way; chicken parmigiana as 1, chilli prawns as 2, spaghetti Bolognese as 3, grilled barramundi as 4, pepper steak as 5 and spicy calamari as 6. He assigns his desserts this way: sticky date pudding as H and tiramisu as T. Find the probability that he chooses: a) Chicken parmigiana and tiramisu

OpenStudy (fibonaccichick666):

What is the probability for each individually?

OpenStudy (anonymous):

1/12? I am not sure

OpenStudy (fibonaccichick666):

For the final answer of the question I asked?

OpenStudy (anonymous):

for the chicken parmigiana is it 2/12 and the tiramisu 6/12?

OpenStudy (fibonaccichick666):

not quite, Simplify those. Where did you get 12 from?

OpenStudy (anonymous):

I thought that 12 comes from the number of possibilities

OpenStudy (fibonaccichick666):

How many options do you have for food?

OpenStudy (anonymous):

6 and 2 for desserts

OpenStudy (fibonaccichick666):

So what chance do you have of getting chicken parm alone?

OpenStudy (anonymous):

1/12

OpenStudy (fibonaccichick666):

why 12?

OpenStudy (anonymous):

I meant 6 sorry

OpenStudy (fibonaccichick666):

write it again? :)

OpenStudy (anonymous):

1/6

OpenStudy (fibonaccichick666):

good. Now, What about just the dessert?

OpenStudy (anonymous):

1/2

OpenStudy (fibonaccichick666):

Correct, now are these events separate?

OpenStudy (anonymous):

yes

OpenStudy (fibonaccichick666):

So when we have separate events, what do we do to their probabilities?

OpenStudy (anonymous):

add then together?

OpenStudy (anonymous):

them*

OpenStudy (fibonaccichick666):

No, not quite.

OpenStudy (fibonaccichick666):

I can't think of a good example where you use addition, but no it's not addition.

OpenStudy (anonymous):

I'm not sure what you would use

OpenStudy (fibonaccichick666):

Well, what is the other thing that we use?

OpenStudy (anonymous):

multiplication?

OpenStudy (fibonaccichick666):

Yeppers

OpenStudy (anonymous):

so do I multiply 1/2 and 1/6 together

OpenStudy (anonymous):

yes

OpenStudy (fibonaccichick666):

That would be correct

OpenStudy (anonymous):

so is the answer 1/6?

OpenStudy (fibonaccichick666):

What is the product of \(\frac{1}{2} ~and~\frac{1}{6}\)

OpenStudy (anonymous):

2/12

OpenStudy (fibonaccichick666):

Where did you get the 2 from?

OpenStudy (anonymous):

1/12

OpenStudy (fibonaccichick666):

First show me your work before I tell you if it's right. (Explain the multiplication)

OpenStudy (anonymous):

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