Answer:
0 tests
Yes, this procedure is better on the average than testing everyone, it makes it less cumbersome.
Step-by-step explanation:
Given the information:
Let P be the probability that a randomly selected individual has the disease = 0.1. N individuals are randomly selected, thereafter, blood samples of each person would be tested after combining all specimens. Should in case one person has the disease then it yields a positive result and test should be set for each person.
Let Y be number tests
For n = 3 there are two possibilities. If no one has the disease then the value is 1 otherwise the value is 4, here P = 0.1
Therefore, for Y = 1
P(Y-1) = P(no one has disease)
= 0.9³
= 0.729
If Y = 4
P(Y-4) = 1-P(y = 1)
= 1 - 0.729 = 0.271
The expected number of tests using this formular gives
E(Y) = 1×0.729 + 4×0.271
E(Y) = 0
Y- Axis
Bc it is being reflected from the Y- Axis
Answer:
7
Step-by-step explanation:
Answer:
D.
C.
Step-by-step explanation:
For the first question, you just need to think about what plus 1/2, or 2/4, equals 3/4. This would be D. or 1/4 because 1/4 + 2/4 = 3/4
For the second question, what number minus 4.4 gets you 13.2. This would have to be C. 17.6 since nothing else even makes sense
