23. 7 white balls and 3 black balls are placed in a row at random.the probabilty that no two black balls are ajacent is

23. 7 white balls and 3 black balls are placed in a row at random.the

1.	23. 7 white balls and 3 black balls are placed in a row at random.the probabilty that no two black balls are ajacent is
Answer» 23. 7 white balls and 3 black balls are placed in a row at random.the probabilty that no two black balls are ajacent is