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.

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ankur midha

  • Oct 21st, 2005
 

a - 0.5

b - 1/3

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pr.rawal

  • Jul 13th, 2007
 

there r 2 king kards........
possibility of getting 1 king card is 0.5
possibility of getting 2 king card is 1/3

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Mamata Kashyap

  • Sep 20th, 2007
 

probability of getting atleast one king=>1/3

probability of getting two kings=>1/15

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Chitra

  • Oct 9th, 2007
 

The possibility of getting atleast one king is : 9/15 that is 3/5

The possibility of getting 2 kings is : 1/15

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Anand Vijapur

  • Oct 9th, 2007
 

Probability to get at least one king = 2/6 * 1 + ( 1-2/6) * 2/5 = 3/5
Probability to get two kings = 2/6 * 1/5 = 1/15

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sureal

  • Nov 19th, 2009
 

a)

1. You can pick up either of the king,so => you can pick a king and other card by 5 different ways,but since you have 2 kings(they are different cards) you have 9 different ways to choose a king and another card.
2. All  ways you can pick 2 card are:
with the first card you have 5 choices ;
with the second, 4 choices;
and so on...=>5+4+3+2+1=15
Answer: 9/15=3/5=60%

b) This is easier, you have only one way to get the two kings so 1;
and the answer is : 1/15.
 

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First think ,how many card is there Total =6 while 2 card are always King mean
6c2 = 15;
a) atleast one king mean = 4c2 = 6
  .
.    .  result = 1-6/15 = 1 - 2/5 = 3/5;

Ans : 3/5;

b)  possibility of 2 king = 2c1/6 = 2/6 = 1/3;
Ans = 1/3

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akhilafbegum

  • Feb 18th, 2015
 

a

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