There are six cards in which it has two king cards. all cards are turned down and two cards are opened
a) what is the possibility to get at least one king.
b) what is the possibility to get two kings.

• a)
  POSSIBILITY TO GET AT LEAST ONE KING IS : 2C1*4C1/6C2 + 2C2/6C2 = 8/15+1/15=3/5
  
  b)
  P0SSIBLITY TO GET TWO KINGS IS 2C2/6C2=1/15
• 15 years agoHelpfull: Yes(4) No(0)
• a)Probability to get at least one king = 1-(probability of getting no king) = 1-(4/6)*(3/5) = 1-2/5 = 3/5;
  b)Probability of getting two kings = (2/6)*(1/5) = 1/15
• 15 years agoHelpfull: Yes(1) No(0)
• a)(2/6)+(1/5)=16/30=8/15 b)(2/6).(1/5)=1/15
• 15 years agoHelpfull: Yes(0) No(0)
• a)2/6+1/5=8/15 b)2/6*1/5=1/15
• 15 years agoHelpfull: Yes(0) No(1)