probabilty

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probabilty

ritu
1.if cards are drawn one by one from a given pack until an ace appears,then find probability that exactly "n" cards are drawn before the first ace appears.

2.if there are 5 ppl such that probability of their dying within a year is "P" then find prob that "A" who is one among the 5 is the first one to die within a year..
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Re: probabilty

anon_econ
Question 1: (48Pn x 4c1)/52Pn+1
Can't understand what is being asked in the second one.