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:
c
Step-by-step explanation:
answer is c
The rope would be 3 yards long because every 3 feet is equal to 1 yard
Answer:
He won 4 games
Step-by-step explanation:
Percentage of games he lost= 75%
Let the total number of games be 
75% of = 12
= 12
75= 12 x 100
= 
=16
Number of games he won = 16-12
= 4
divide 50 by 6.2, because 6.2 and x are entangled by multiplication. once you do that, you will have your answer. it should be 8.06
