I'm not sure if i got correct answers as i often choose q and p wrong
The probability that the part will not pass the quality test is equal to 0.2. Which
the probability that out of 400 randomly selected parts will be defective:
a) 80 parts;
b) from 30 to 80 parts
My try: p=0,2 q=0,8 n=400
A)k=80 P400(80)=0,05 (Laplace's formulas)
B) P400(30<=k<=80)=x(0)+x(6,25)=0,5
The probability that the part will not pass the quality test is equal to 0.2. Which
the probability that out of 400 randomly selected parts will be defective:
a) 80 parts;
b) from 30 to 80 parts
My try: p=0,2 q=0,8 n=400
A)k=80 P400(80)=0,05 (Laplace's formulas)
B) P400(30<=k<=80)=x(0)+x(6,25)=0,5