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Use substitution to solve the system. 5x – 4y = 32 y = 2x – 11
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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.