Tuesday 11 February 2014

PROBABILITY C4

Devika takes 2 cards from a standard deck of 52 cards.
What will be the probability of getting a pair of queens?

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(Queens) =      x    4
                       52         52

P(Queens) =    16     =      1 
                       2704         169  


Therefore Probability of drawing 2 queens is 1/169    



TRY THIS.......

Devika takes 2 cards from a standard deck of 52 cards.
What will be the probability of getting a queen and a jack?


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