18 would have to be the mean because of the average
Answer:
0.91854
Step-by-step explanation:
Given that a company is interested in evaluating its current inspection procedure on large shipments of identical items.
The procedure is to take a sample of 5 items and pass the shipment if no more than 1 item is found to be defective.
It is known that items are defective at a 10% rate overall.
If X is the number of defectives in the sample of 5, we find that X has two outcomes and each trial is independent of the other
So X is binomial with n =5, and p = 0.10
the probability that the inspection procedure will pass the shipment
= 
You bring the numerals on to the other side of the equation, therefore dividing 19 by 3 and 6.
3x + 6y = 19
3x + y = 19/6
x + y = 3.17/3
x + y = 1.1