Question 133924: Can someone please help me with these two questions? I am having a difficult time and am not sure what to do.
1) The probability that federal income tax returns will have 0,1,or 2 errors is 0.53,0.15, and 0.32 respectively. If 10 randomly selected returns are audited, what is the probability that six will have no errors, three will have one error, and one will have two errors?
2) The probability that a person will have 0,1, or 2 dental checkups per year is 0.2, 0.5, and 0.3 respectively. If seven people are picked at random, what is the probability that two will have no checkup, four will have one checkup and one will have two checkups in the next year.
Answer by stanbon(75887)   (Show Source):
|
|
|
