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# Permutation & Combination Q :

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Intern
Joined: 24 Apr 2009
Posts: 2
Permutation & Combination Q : [#permalink]

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24 Apr 2009, 03:32
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Question Stats:

100% (00:58) correct 0% (00:00) wrong based on 0 sessions

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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?
Manager
Joined: 14 Nov 2008
Posts: 195
Schools: Stanford...Wait, I will come!!!
Re: Permutation & Combination Q : [#permalink]

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24 Apr 2009, 04:11
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.
Intern
Joined: 24 Apr 2009
Posts: 2
Re: Permutation & Combination Q : [#permalink]

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24 Apr 2009, 07:22
i saw the answer to be 1008

dont know how those guys calculated
Senior Manager
Joined: 08 Jan 2009
Posts: 324
Re: Permutation & Combination Q : [#permalink]

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26 Apr 2009, 17:24
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?
Manager
Joined: 19 Aug 2006
Posts: 238
Re: Permutation & Combination Q : [#permalink]

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26 Apr 2009, 17:43
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.
Manager
Joined: 02 Mar 2009
Posts: 134
Re: Permutation & Combination Q : [#permalink]

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27 Apr 2009, 07:34
Got the same--168 ways. tkarthi, he meant 3 different types of crust mentioned in the question.
Re: Permutation & Combination Q :   [#permalink] 27 Apr 2009, 07:34
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