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 Post subject: ProbabilityPosted: Fri Feb 01, 2013 11:41 am

Joined: Fri Feb 01, 2013 11:35 am
Posts: 1
Is the following statement correctly formed? If so, how do you solve it?

Two cards are drawn from a standard deck and not replaced. Find P (K and a heart).

Thanks!
Kretias

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 Post subject: Re: ProbabilityPosted: Sun Feb 03, 2013 8:18 am

Joined: Sun May 30, 2010 2:23 am
Posts: 498
Assuming that a standard deck is a 52-card deck, then it is left to understand what probability we are asked to calculate.
kretias wrote:
Find P (K and a heart).
P stands for probability and "(K and a heart)" stands for an event. But what event is it?
Is it "One of them is King and another one is a heart"?
Is it "The first one is King and the second one is a heart"?

I would say it is the first one as "Two cards are drawn from" without "one-by-one" implies that they are drawn together.

Then use the following formulas to solve:
- the basic definition of discrete probability
- the formula for taking two elements out of 52 without a replacement
- calculate the number of favorable outcomes

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