400
How many ways can 4 prizes be given away to 3 boys (one boy can receive 1 prize), if each boy is eligible for all the prizes?
A.
256
B.
24
C.
12
D.
None of these
Option(B) is correct
Let the 3 boys be B1,B2,B3B1,B2,B3 and 4 prizes be P1,P2,P3P1,P2,P3 and P4P4.
Now B1B1 is eligible to receive any of the 4 available prizes (so 4 ways)
B2B2 will receive prize from rest 3 available prizes(so 3 ways)
Finally, B3B3 will receive his prize from the rest 2 prizes available(so 2 ways)
So total ways would be: 4×3×2=244×3×2=24