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ReaFam
19.04.2021 •
Mathematics
PLEASE HELP I NEED THE POINTS FOR THIS QUESTION, ILL GIVE BRAINLIEST To qualify as a contestant in a race a runner Has to be the fastest 16% of all applicants. The running times are normally distributed, with a mean of 63 minutes and a standard deviation of 5 minutes. to the nearest minute, what is the qualifying time for the race?
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Ответ:
it is within 5 minutes ahead or behind 5 minutes of 64 minutes
let me know if it´s wrong
Ответ:
A) 0.45
B) 26 men out of 200 shoppers prefer mineral water
Step-by-step explanation:
A) you can do 0.58-0.13 or 0.59-0.14, they will both give you the answer of 0.45 because you are subtracting a total (0.58 or 0.59) from a part (0.13 or 0.14)
B) the frequency of men who like mineral water is 0.13 (this is a number out of one person). Thus, if you want the number of men out of 200 people, multiply this frequency by 200
Ie. 0.13x200= 26