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3 years ago

Conditional Probability

Mathematics

1 answer:

trapecia [35]3 years ago

3 0

To solve for P(QIR) we use the formula:
P(QIR)=[P(Q∩R)]/P(R)
But from the diagram:
P(Q∩R)=3/22
P(R)=7/22
hence
P(QIR)=3/22÷7/22=3/7

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Answer:

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3 years ago

Which expression is equivalent to(60)^2-(12)^2?

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Answer:

The answer is

${60}^{2} - {12}^{2} \\ = (60 - 12)(60 + 12)$

Step-by-step explanation:

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3 years ago

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Answer:

(1,155, 1.545).

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From Normal distribution tables the z score for 95% CI = 1.96.

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3 years ago

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dimulka [17.4K]

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6 mile/hour

Explanation :

Let the speed of walking of James = x mile/hour

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= > (9 + 3)/2x = 2

= > 12 = 4x

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Answer:

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Step-by-step explanation:

We have been given that

$\mu=25,\sigma=4,x_1=20,x_2=30$

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$z-\text{score}=\frac{x-\mu}{\sigma}$

For $x_1=20$

$z_1=\frac{20-25}{4}\\\\z_1=-1.25$

For $x_2=30$

$z_2=\frac{30-25}{4}\\\\z_2=1.25$

Now, we find the corresponding probability from the standard z score table.

For the z score -1.25, we have the probability 0.1056

For the z score 1.25, we have the probability 0.8944

Therefore, the percent of the trees that are between 20 and 30 years old is given by

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4 years ago

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