Answer:
P ( not white ball) = 2/3
Step-by-step explanation:
If there are 10 blue balls and 10 black balls and 10 white balls,
10+10+10 = 30 total balls
P(white ball) = white balls/ total balls
= 10/30
= 1/3
P (not getting a white ball) = not white/ total
= (blue + black)/ total
= (10+10)/30
=20/30
2/3
