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user434568
27.02.2020 •
Mathematics
Andrea and Ashley are middle distance runner's for the schools traffic and FaceTime in the 500 m race are approximately normally distributed with a mean of 62 seconds in a standard of deviation of 0.8 seconds. The school record for the 400m is 60 seconds what is the probability the end of your breaks the record in her next race,
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Ответ:
0.006 is the probability that the record will be broken in next year.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 62 seconds
Standard Deviation, σ = 0.8 seconds
We are given that the distribution of face time is a bell shaped distribution that is a normal distribution.
Formula:
The record will be broken if the time is less than 60 seconds.
P(time is less than 60 seconds)
P(x < 60)
Calculation the value from standard normal z table, we have,
Thus, 0.006 is the probability that the record will be broken in next year.
Ответ:
Step-by-step explanation:
1/4*5= 5/4
1 1/4
or do the same with decimals
(1/4=0.25)*5=
0.25*5=1.25
1.25=5/4=1 1/4
hope it helped ;0