Answer:
a) Binomial.
b) n=20, p=0.01, k≥2
The probability hat a package sold will be refunded is P=0.0169.
Step-by-step explanation:
a) We know that
- the defective probability is constant and independent.
- the sample size is bigger than one subject.
The most appropiate distribution to represent this random variable is the binomial.
b) The parameters are:
- Sample size (amount of clips in the package): n=20
- Probability of defective clips: p=0.01.
- number of defective clips that trigger the money-back guarantee: k≥2
The probability of the package being refunded can be calculated as:

U mean 4x-4^2=3^2 ? if u mean that the ans would be 6,25
the 3rd answer should be the correct one
5/8 of the total has been sold, so we just do 64*5/8=40 houses that had been sold this year. Hope this helped!
Answer:
6:15
Step-by-step explanation:
Hope this helps, lemme know if you need any further help (: