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) =  4      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?