This is my homework question:
There is an 81% chance a new Nogo car will have no defects. A dealer has just received 5 new Nogos. What is the probability that 2 or less of the cars have no defects?
I worked the problem and got 61% is that right? If not, can you show me the right way to do it? I'm supposed to use the nCr formula.
Here's the second question: again using the nCr method.
18) A shipment of D-cell batteries left the Pretty Good Battery Company before the quality inspectors checked them. Unfortunately, 10 out of every 100 of these batteries was no good. Ferdinand bough 4 of these batteries from a local 24 hourstore.
(a) What is the probability that exactly one of the batteries that he bought was
no good? I computed this answer to be 42%. is this right?
(b) What is the probability that at most one of the batteries that he bought was
no good? I computed this and got 1.25%. I think that is very wrong...
Thanks for all the help!