Answer:
<u>One</u>
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Answer: 17.89
Step-by-step explanation:
In binomial distribution, the standard deviation is given by :-

As per given , we have
The number of vouchers in the sample with errors is denoted by x.
p= 0.20 , n = 2000
Then , 

Hence, the standard deviation of x is 17.89.
Answer:
Sonic has the answer
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
t
=
−
1
2/8 of an hour is 15,and 2/6 of an hour is 20 minutes. 20-15 is 5 minutes
In this exact order:
5+1.75x=y
Sorry for the wait..Hope this helps