A box contains 5 green, 4 yellow and 3 white balls. Three balls are drawn at random. What is the probability that they are not of same colour. Choose the correct option:  A) 52/55  B) 3/55  C) 41/44  D) 3/44  E) None of these
Explanation:   Total cases =1241/443=12∗11∗10/3∗2∗1=220   Total cases of drawing same colour =541/443+441/443+341/443   5∗4/2∗1+4+1=15   Probability of same colur ==15/220=3/44   Probability of not same colur =1−3/44=41/44   Option 41/44
<result>C</result>
A box contains 5 green, 4 yellow and 3 white balls. Three balls are drawn at random. What is the probability that they are not of same colour.