Answer:
Since you are 11th in a queue starting from either end so there are 10 persons to your left and 10 to your right
∴∴ Total number of persons are
10+1+10=21
Disinfectant are formulated to destroy the activities of microorganisms.
<h3>What is disinfectant?</h3>
Disinfectant refer to liquid or chemical solution which is formulated to kill microorganisms and disrupts their activities. There are several types of disinfectants and they are formulated to serve several purposes.
Note: The question is incomplete and the completed part cannot be found on any website, hence the question is still answerable.
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Answer:
The answer is 0.9599.
Explanation:
mu (sample) = mu = 8.4
s.d. (sample) = 1.8/ sq. rt. 40
P( greater than 8.1) = (8.9-8.4)/(1.8/ sq. rt. 40)
Let x be the mean time for the 40 mechanics
Standardize the mechanics: (8.9-8.4)/(1.8/ sq. rt. 40) = 1.75 = Z
P( x > 8.9) = P(Z > 1.75), this means the area to the right of Z = 1.75.
Then you need to look in the table of the Normal distribution, Z(1.75) =0.9599
