As part of a game, two people each must secretly choose an integer between 1 and 2, inclusive. What is the approximate likelihood that all two people will choose different numbers?
Pick.
A) 9%
B) 12%
C) 16%
D) 20%
E) 50%
Ans:50%   1st person has option no's- (1,2) - there fore probability of getting a no = 2c1/2c1 = 1   2nd person has only one option   - there fore probability of getting a no = 1c1/2c1 =1/2   =1*1/2 =50%
<result>E</result>
As part of a game, two people each must secretly choose an integer between 1 and 2, inclusive. What is the approximate likelihood that all two people will choose different numbers?