The employees of a firm that manufactures insulation are being tested for indications of asbestos in their lungs. The firm is re
quested to send 4 employees who have positive indications of asbestos on to a medical center for further testing. If 55% of the employees have positive indications of asbestos in their lungs, find the probability that 11 employees must be tested in order to find 4 positives. If each test costs 300 Swedish kronor, find the expected value of the total cost of conducting the tests necessary to locate the 4 positives. Swedish kronor Find the variance of the total cost necessary to locate the 4 positives.
1 answer:
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Good, right?
Answer:
Step-by-step explanation:
Here, the given expression is:
Now, by logarithm rules, we know
if
, then x =
Comparing here, b = 10 and z = 2
⇒ y =
or,