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Ymorist [56]
3 years ago
6

a school counts the number of students taking AMDM and find 221 students taking AMDM. they also count the number of students tak

ing physics and find 241 students taking the physics. when they compare the two lists they find 80 student taking AMDM and physics. what is the probability of a student taking AMDM given they are taking physics? (answer in decimal form rounded to the thousandth)
Mathematics
1 answer:
Masja [62]3 years ago
4 0

Answer:

33.195%

Step-by-step explanation:

AMDM: 221 students

Physics: 241 students

Taking both: 80 students

80/241 = ~33.195%

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DaniilM [7]

Answer:

Probability that a battery will last more than 19 hours is 0.0668.

Step-by-step explanation:

We are given that the lifetime of a battery in a certain application is normally distributed with mean μ = 16 hours and standard deviation σ = 2 hours.

<em>Let X = lifetime of a battery in a certain application</em>

So, X ~ N(\mu=16,\sigma^{2} =2^{2})

The z-score probability distribution for normal distribution is given by;

               Z = \frac{  X -\mu}{\sigma}  ~ N(0,1)

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The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

So, the probability that a battery will last more than 19 hours is given by = P(X > 19 hours)

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Hence, the probability that a battery will last more than 19 hours is 0.0668.

5 0
3 years ago
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Step-by-step explanation:

Hope it helps you in your learning process.

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