Answer: Our required probability is 0.99338.
Step-by-step explanation:
Since we have given that
n = 100
p = 0.200
So,
So, we can apply normal approximation.
Mean = 20
Standard deviation =
Since
So, Probability that fewer than 30 but a packet after testing a free sample is given by
Hence, our required probability is 0.99338.
Answer: Option D
Step-by-step explanation:
We can use the binomial formula to solve this problem.
Where p is the probability of success, n is the sample size and x is the number of successes expected.
Note that in this case
(probability that a part is defective)
Then we calculate the probability
<span> C.<span>No, because each lime will cost a bit more than 30¢, so 4 limes will cost a bit more than $1.20.</span></span>