I bought three toys for my triplet boys (one for each). I placed the toys in the dark store. One by one each boy went to the store and pick the toy. What is the probability that no boy will choose his own toy? Choose the correct choice from the following choices:
A) 1/4	B) 1/3	C) 1/6	D) 2/3	E) 1/9
B   1/3   Assuming T1 is the Toy for brother1, T2 is the toy for brother2 and T3 is the toy for brother3.   Following are the possible cases for toys distribution:   Boy1 Boy2 Boy3   T1 T2 T3   T1 T3 T2   T2 T1 T3   T2 T3 T1 .... (A)   T3 T1 T2 .... (B)   T3 T2 T1   In both steps (A) &amp; (B), no one gets the correct toy.   Therefore probability that none brother can get the own toy is 2/6 = 1/3
<result>B</result>
I bought three toys for my triplet boys (one for each). I placed the toys in the dark store. One by one each boy went to the store and pick the toy. What is the probability that no boy will choose his own toy?