The 100th customer would be the first to receive both.
20×5=100
50×2=100
Answer: 
Step-by-step explanation:
The confidence interval for population mean is given by :-
, where 
= Population standard deviation.
n= sample size
= Sample mean
z* = Critical z-value .
Given : 
n= 49
Two-tailed critical value for 95% confidence interval = 
Then, the 95% confidence interval would be :-
Hence, the 95% confidence interval for estimating the population mean 
:
Answer:
I think $21 or $7.88
Step-by-step explanation:
check it again and there you go
Answer:
Hi
Step-by-step explanation:
Look at it this way:
-- Since the two groups have the ratio of 4 to 7, then the first group has 4 parts
and the other group has 7 parts.
-- If the first group has 4 parts and the other group has 7 parts, then they have
11 parts all together.
-- Those 11 parts are all parts of 33. There must be ( 33 / 11 ) = 3 items in each part.
Now you can go back to the groups . . .
-- The first group has 4 parts.
With 3 items in each part, that's (4 x 3) = 12 items.
-- The other group has 7 parts.
With 3 items in each part, that's (7 x 3) = 21 items.
