A drinks factory packed their drinks into red and yellow boxes. There were 24 more red boxes than yellow boxes. Each red box con
tained 60 packets of milk and each yellow box contained 75 packets of fruit juice. There were 120 fewer of milk than packets of fruit juice in all
boxes.
(a) How many yellow boxes were used ?
(b) How many packets of milk were packed into the the red boxes?
boxes.
(a) How many yellow boxes were used ?
(b) How many packets of milk were packed into the the red boxes?
1 answer:
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Answer:
If the lot has 4 defective covers out of 25 total covers, the probability of accepting the lot is P=0.98.
Step-by-step explanation:
We have a population of N=25 skylight covers, were K=4 are defective.
We sample n=5 covers, and we will accept the lot if k=2 or fewer are defective.
We will use the hypergeometric distribution to model this probabilities.
First, to be accepted, the sample can have 2, 1 or 0 defective covers, so the probability of being accepted is:
The probability that there are k defective covers in the sample is:
Then, we can calculate the individual probabilities as:
If we add this probabilities, we have:
If the lot has 4 defective covers out of 25 total covers, the probability of accepting the lot is P=0.98.