Tuesday, 11 February 2014

PROBABILITY C3

A certain man takes 2 cards from a standard deck of 52 cards.
What will be the probability of getting a pair of jacks?

Solution

(this is a problem with replacement)

n(E) = 4, n(S) = 52

P(E) = n(E)
           n(S)

1st pick = 4/52
2nd pick = 4/52 as well.

P(Jacks) =      x    4
                  52         52

P(Jacks) =    16    =      1 
                  2704        169  


Therefore Probability of drawing 2 jacks is 1/169     


TRY THIS.....................

A certain man takes 2 cards from a standard deck of 52 cards.
What will be the probability of getting a pair of number 9?

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