# Beginner permutations questions clarification

• Jun 21st 2011, 11:16 AM
IanCarney
Beginner permutations questions clarification
Jeff has a choice of three soups, four types of sandwiches, and two desserts. In how many ways can Jeff choose his lunch if he has soup, a sandwich, and dessert?

I completely forgot how to do questions like that. Is it simply 3P1 + 4P1 + 2P1 = 24? I feel like I'm missing something.
• Jun 21st 2011, 11:22 AM
Plato
Re: Beginner permutations questions clarification
Quote:

Originally Posted by IanCarney
Jeff has a choice of three soups, four types of sandwiches, and two desserts. In how many ways can Jeff choose his lunch if he has soup, a sandwich, and dessert?

Note that $\displaystyle 3\cdot 4\cdot 2=24$. Simple multiplication.

Also note that $\displaystyle _3P_1 + _4P_1 + _2P_1 = 9\ne 24?$
• Jun 21st 2011, 11:26 AM
IanCarney
Re: Beginner permutations questions clarification
Quote:

Originally Posted by Plato
Note that $\displaystyle 3\cdot 4\cdot 2=24$. Simple multiplication.

Also note that $\displaystyle _3P_1 + _4P_1 + _2P_1 = 9\ne 24?$

Right I meant multiplying them. And thanks! Guess I was over complicating things.