Task: Question Answering
Input (English): Problem: a toy train produces at least 10 different tunes when it moves around a circular toy track of radius 5 meters , at 10 meters per minute . however , the toy train is defective and it now produces only two different tunes at random . what is the probability that the toy train produces 3 music tunes of the same type ( 1 in _____ ) ? 
Options: a ) 3 , b ) 9 , c ) 8 , d ) 4 , e ) 5
Output (English): d