Statistics Questions

time for retarded questions

2) In a large vat of marbles, 30% are brown, 20% are red, 20% are yellow, 10% are green, 10% are orange, and the rest are blue. If a marble is drawn at random, what’s the probability that it’s (a) red or green (b) not yellow (c) neither yellow nor blue. If four marbles are drawn at random what’s the probability that (d) all are yellow (e) none are brown (f) exactly one is brown (g) at least one is brown (h) the first marble or the last marble is brown

Whats the formula for (f)? thanks!

lastly H please?

A certain automobile requires 12 (identical) chips all to function. 5% of the chips made by the manufacturer are defective, and when the automobile is made, 12 chips are independently chosen from this large shipment of chips. What’s the probability that the automobile will function?

also what formula would i use for this? thanks all you've been a lot of help so far!