Question
In how many ways can 4 balls be selected from a box containing 1 red, 2 blue, 3 white and 4 black balls such that at least two selected balls are of the same colour? It is known that all the balls of a colour are identical.
___
___
Answer:
:
2 same, 1 different, 1 different = 3C2∗3C2=9
3 same 1 different = 2C2∗3C2=6
4 same = 1
Total = 16
Was this answer helpful ?
:
2 same, 1 different, 1 different = 3C2∗3C2=9
3 same 1 different = 2C2∗3C2=6
4 same = 1
Total = 16
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution