In a function they are distributing noble prize. In how many ways can 3 prizes be distributed among 9 boys when No boy gets more than one prize?	Select the correct option.
A) 504
B) 514
C) 517
D) 520
E) 527
Sol. In this case, repetitions are not allowed. So, the first prize can be given in 9 ways. The second in 8 ways and the third in 7 ways. But fundamental principle, (9 x 8 x 7) ways = 504 ways   504
<result>A</result>
In a function they are distributing noble prize. In how many ways can 3 prizes be distributed among 9 boys when No boy gets more than one prize?