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local restaurant

by GmatKiss » Sat Aug 06, 2011 12:47 pm
A local restaurant draws a business card from a jar every day. The person whose name is drawn receives a free meal. Floyd drops his business card in the jar at the beginning of the month. Thirty days later, assuming that his card hasn't been drawn yet, what is the percent change in the probability that Floyd's card will be drawn from the jar on the next drawing?

(1) Only one card is drawn from the jar every day.

(2) On average, 10 business cards are added to the jar everyday.
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by maihuna » Sat Aug 06, 2011 12:51 pm
E. we do not know how many other cards were there at the begin of the month.
GmatKiss wrote:A local restaurant draws a business card from a jar every day. The person whose name is drawn receives a free meal. Floyd drops his business card in the jar at the beginning of the month. Thirty days later, assuming that his card hasn't been drawn yet, what is the percent change in the probability that Floyd's card will be drawn from the jar on the next drawing?

(1) Only one card is drawn from the jar every day.

(2) On average, 10 business cards are added to the jar everyday.
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by gmatboost » Sun Aug 07, 2011 10:54 pm
This is not a realistic question, there is just way too much information missing.
I would be careful about using questions from whatever source this comes from.
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