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siniylev [52]
3 years ago
9

The average time taken to complete a test follows normal probability distribution with a mean of 70 minutes and a standard devia

tion of 25 minutes. The probability of a randomly selected student completing the test in 45 minutes or less is approximately equal to ____%. The probability of a randomly selected student completing the test in 95 minutes is ____%.
Mathematics
1 answer:
Dimas [21]3 years ago
3 0
Under 45 mins is roughly 16%. This is because 68% of the curve exists within 1 SD of the mean. So 16% must be outside and smaller and 16% outside and larger (on average). 

It is impossible to determine how likely you are to find someone with exactly the second amount. However, if you are looking for that or less, you would get 84%
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Answer:

b=49

Step-by-step explanation:

27+b=76

76-27= 49

b=49

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Answer:

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Step-by-step explanation:

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Answer:

A) \dfrac{11}{23}

B) \dfrac{88}{345}

Step-by-step explanation:

A survey of 46 college athletes found that

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A) If we pick one athlete survey participant at random,  the probability they play basketball is

P_1=\dfrac{22}{46}=\dfrac{11}{23}

B) If we pick 2 athletes at random (without replacement),

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Thus, the probability we get one volleyball player and one basketball player is

P_2=\dfrac{12}{23}\cdot \dfrac{22}{45}=\dfrac{88}{345}

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The Enterprise High School girl's soccer team won 80% of their games last year if the team won 12 games how many did they play?
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2(5x+7)=34 two step equation full answer
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