Probablity

Question

1. 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.  An Ace is not a picture card (that's only K, Q ,J).  Well, anyway, shall I presume that the pack in this question has exactly 16 cards (4 each of A, K, Q, J)?  If so, P(ace) = 4/16 = 1/4

 

b. What an awkwardly worded question; should be "what's prob. of rolling a 4 on 1 toss of a standard die".  1/6 is answer.

 

c. 6/16 = 3/8.  This is a Binomial Distribution problem.