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Permutation & Combination Q :

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Intern
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Permutation & Combination Q : [#permalink]

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New post 24 Apr 2009, 04:32
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Question: Pats pizza offers thick, thin and deep-dish crust style. there are 8 choices for toppings.

In how many ways can you choose a pizza with three diff toppings?

How do we solve this Q?

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Schools: Stanford...Wait, I will come!!!
Re: Permutation & Combination Q : [#permalink]

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New post 24 Apr 2009, 05:11
harmeetistudy wrote:
Question: Pats pizza offers thick, thin and deep-dish crust style. there are 8 choices for toppings.

In how many ways can you choose a pizza with three diff toppings?

How do we solve this Q?

Dividing the question,
We can choose Pizza in 3 Ways, 3C1.
now, we can choose 3 topping out of 8 choices in , 8C3 ways,
= 56 Ways,
So, total number of ways of choosing pizza, 56*3=168 Ways.

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Intern
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Joined: 24 Apr 2009
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Re: Permutation & Combination Q : [#permalink]

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New post 24 Apr 2009, 08:22
i saw the answer to be 1008 :shock:

dont know how those guys calculated :!:

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Senior Manager
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Re: Permutation & Combination Q : [#permalink]

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New post 26 Apr 2009, 18:24
lgon wrote:
harmeetistudy wrote:
Question: Pats pizza offers thick, thin and deep-dish crust style. there are 8 choices for toppings.

In how many ways can you choose a pizza with three diff toppings?

How do we solve this Q?

Dividing the question,
We can choose Pizza in 3 Ways, 3C1.
now, we can choose 3 topping out of 8 choices in , 8C3 ways,
= 56 Ways,
So, total number of ways of choosing pizza, 56*3=168 Ways.


Hey how did you take No of ways to choose the pizza as 3c1. The question did not state any where there where 3 diff types of pizzas? Can u pls explain?

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Re: Permutation & Combination Q : [#permalink]

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New post 26 Apr 2009, 18:43
lgon wrote:
harmeetistudy wrote:
Question: Pats pizza offers thick, thin and deep-dish crust style. there are 8 choices for toppings.

In how many ways can you choose a pizza with three diff toppings?

How do we solve this Q?

Dividing the question,
We can choose Pizza in 3 Ways, 3C1.
now, we can choose 3 topping out of 8 choices in , 8C3 ways,
= 56 Ways,
So, total number of ways of choosing pizza, 56*3=168 Ways.


That's the exact same way I solved it.
Concur on this answer.

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Re: Permutation & Combination Q : [#permalink]

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New post 27 Apr 2009, 08:34
Got the same--168 ways. tkarthi, he meant 3 different types of crust mentioned in the question.

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Re: Permutation & Combination Q :   [#permalink] 27 Apr 2009, 08:34
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