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24.02.2020 •
Mathematics
A certain manufactured item is visually inspected by two different inspectors. When a defective item comes through the line, the probability that the first inspector misses it is 0.1. Of those that get past the first inspector, the second inspector will "miss" 5 out of 10. What fraction of defective items get by both inspectors?
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Ответ:
The fraction of a defective item getting by both inspectors is =
Step-by-step explanation:
Step 1; Assume that the probability of the first inspector missing a defective part is P(A) and the probability of the second inspector missing those that do get past the first inspector is P(B).
Step 2; It is given that P(A) = 0.1, we convert this into a fraction so that the final probability will be a fraction and not a decimal.
P(A) = 0.1 = .
It is given that the second inspector misses 5 out of 10 that get past the first inspector, so P(B) = .
Step 3; To calculate the probability of both inspectors missing a defective part, we multiply both the probabilities.
P(A and B happening) = P(A) × P(B) = × = = = 0.05%. So there is a 0.05% chance of both inspectors missing a defective part.
Ответ:
Step-by-step explanation:
Given : Miles owes one of his friends $8.
He also borrows $15 from his parents.
Then, the total money he has is given by using the addition operation :-
Total money he has = Money owes from friends +Money owes from parents
i.e Total money he has = 8+15
Hence, the expressions could be used to find how much money he has :-