PROBABILITY 3

A certain man takes 2 cards from a standard deck of 52 cards.

What will be the probability of getting a pair of NUMBER 7 cards?

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(No. 7) =  4      x    4

                  52         52

P(No.7) =    16    =      1 

                  2704        169  

∴ Probability of drawing two No.7 cards 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 diamond cards?