give the probability

Question

Write each as a set and then give the probability, of the following happening?
a) From a full pack of picture cards (J,Q,K,A) an ace is dealt?
b) From a set of a single die that a 4 is rolled?
c) From the birth of quadruplets 2boys and 2 girls are born?

Answer 1

a) Pr ( A ) = 1/4

 

b) Pr ( die = 4 ) = 1/6

 

c) C ⁴₂  *  (1/2 ) ^2 * ( 1/2 ) ^2 =6 ( 1/16)=

 

    6/16=3/8 

 

 Mistake has been corrected.

  See the comment.