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Mathematics 21 Online
OpenStudy (anonymous):

What is the probability of drawing a spade from a standard deck of cards on a second draw, given that a spade was drawn on the first draw and not replaced

OpenStudy (perl):

if you draw a spade on the first draw, how many spades are left

OpenStudy (anonymous):

51?

OpenStudy (perl):

51 is the number of cards left in the deck. how many spades are left , if you draw a spade on first draw?

OpenStudy (perl):

hint: there are 13 spades in a full deck of 52 cards.

OpenStudy (anonymous):

12

OpenStudy (perl):

right :)

OpenStudy (perl):

so you have your numerator and denominator

OpenStudy (anonymous):

which one is the numerator

OpenStudy (perl):

Probability = # favorable / # total so the numerator will be 12 , since the favorable event here is picking a spade

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