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NemiM [27]
3 years ago
14

A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 45.0 and 55.

0 minutes. Find the probability that a given class period runs between 51.5 and 51.75 minutes.
Find the probability of selecting a class that runs between 51.5 and 51.75 minutes.
Mathematics
1 answer:
yuradex [85]3 years ago
3 0
Given:

Uniform distribution of length of classes between 45.0 to 55.0 minutes. 

To determine the probability of selecting a class that runs between 51.5 to 51.75 minutes, find the median of the given upper and lower limit first:

45+55/2 = 50

So the highest number of instances is 50-minute class. If the probability of 50 is 0.5, then the probability of length of class between 51.5 to 51.75 minutes is near 0.5, approximately 0.45. <span />
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Answer:

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Step-by-step explanation:

Given

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Required

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2ab - 6a + 5b + \_

Split to 2

(2ab - 6a) + (5b + \_)

Factorize the first bracket

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Represent the _ with X

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Factorize the second bracket

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To result in a linear expression, then the following condition must be satisfied;

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Subtract b from both sides

b - b- 3 = b - b+ \frac{X}{5}

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Multiply both sides by 5

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X = -15

Substitute -15 for X in 2a(b - 3) + 5(b + \frac{X}{5})

2a(b - 3) + 5(b + \frac{-15}{5})

2a(b - 3) + 5(b - \frac{15}{5})

2a(b - 3) + 5(b - 3)

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The two linear expressions are (2a+ 5) and (b - 3)

Their product will result in 2ab - 6a + 5b - 15

<em>Hence, the constant is -15</em>

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