Answer: The sampling frame is 400 and the sample 250.
Step-by-step explanation:
The sampling frame is a list of elements used to determine the samples. The sampling frame contains 400 senior citizens of which 250 samples were interviewed.
You said that (1/2) / N = 1/3
Multiply each side by 'N' : (1/2) = 1/3 N
Multiply each side by 3 : 3/2 = N
or 1-1/2 = N .
Answer:
18 machines
Step-by-step explanation:
Data provided in the question:
It takes 4 machines 6 days to produce x units
Therefore,
it will take 4 machines 18 days to produce 3x units
let it takes Y machines 4 days to produce 3x units
Thus,
4 × (18 days) = 3x .............(a)
Y × (4 days) = 3x .............(b)
equating equation a and b, we get
or
4 × (18 days) = Y × (4 days)
or
Y = 18
Hence,
18 machines are required to produce a total of 3x units of product P in 4 days
