Ask question

Ask question

All categories

3 years ago

7

Suppose you choose a marble from a bag containing 4 red marbles, 2 white marbles, and 3 blue marbles. You return the first marbl

e to the bag and then choose again. Find P(red and blue).

2 answers:

ira [324]3 years ago

8 0

4/9*3/9= 12/81=4/27
You have a 4 in 27 chance of drawing a red then a blue.

Rasek [7]3 years ago

4 0

The Answer Is 4/27 Hope This Helped

You might be interested in

A math book costs $9 and a science book costs $7. If Steve spends all his money in the science books, he still has $6 left. Howe

Keith_Richards [23]

A. 7 books each
B. he has $55

5 0

3 years ago

Read 2 more answers

Find the sum.<br> 5x 4<br> ____ + ____<br> 7x - y y - 7x

frez [133]

Answer:

B. 5x+4

Step-by-step explanation:

Solving this is quite easy.

Add 5x and 4 getting 5x+4
Look at your bottom variables..since 7x and -7x are opposites they will cancel out! And same thing goes for y and -y.

5 0

3 years ago

Solve the equation |t+8|=5

vodka [1.7K]

We have t+8=5 or t+8=-5

So t1 = -3 and t2 = -13

4 0

4 years ago

Explain why an elevation less than -5 feet represents a distance from sea level greater than 5 feet.

Morgarella [4.7K]

The elevation represents a distance from the sea level greater than 5 feet,

because the original description specifies a distance greater than 5 feet

below sea level.

Reasons:

The elevation given as a distance is the height or distance above sea level.

In the above description, elevation is a vector, given that it has both

magnitude (distance) and direction (above sea level).

Distance is a scalar quantity, that has only a magnitude that specifies the

space covered during motion.

An elevation of less than -5 feet indicates that distance of the location

above sea level is less than -5 feet, which is the same as; the distance of

the location below sea level is greater than 5 feet.

Less than -5 feet above sea level = Greater than 5 feet below sea level

Therefore;

An elevation of less than -5 feet represents a distance from (below) sea level greater than 5 feet

Learn more about vector and scalar quantities here:

brainly.com/question/11968679

6 0

2 years ago

Researchers wondered if there was a difference between males and females in regard to some common annoyances. They asked a rando

inysia [295]

Answer:

a)

The proportions of the females and males who took the survey who are annoyed by the behavior in question are<u> 0.3301 </u>and_<u>0.3791 </u>respectively

b)

<em>D) The data come from a Population that is Normally distributed</em>

<em>F) the samples are independent</em>

<em>c) </em>

<em>Null hypothesis: H₀: </em> $p_{m} ^{-} - p^{-} _{fm} \leq 0$

<em>Alternative Hypothesis H₁</em>: $p_{m} ^{-} - p^{-} _{fm} \geq 0$

Step-by-step explanation:

Given data Among the 530 males surveyed, 175 responded "Yes

The sample proportion of males

$p_{m} ^{-} = \frac{x}{n} = \frac{175}{530} = 0.3301$

The sample proportion of 575 Females surveyed, 218 responded "Yes

$p_{fem} ^{-} = \frac{x}{n} = \frac{218}{575} = 0.3791$

a)

The proportions of the females and males who took the survey who are annoyed by the behavior in question are<u> 0.3301 </u>and_<u>0.3791 </u>respectively

b)

<em>The data come from a Population that is normally distributed.</em>

<em>The two samples are independent</em>

c)

<em>Null hypothesis: H₀: </em> $p_{m} ^{-} - p^{-} _{fm} \geq 0$

<em>Alternative Hypothesis H₁</em>: $p_{m} ^{-} - p^{-} _{fm} \leq 0$

We will use two samples Z - hypothesis test

$Z = \frac{p^{-} _{m} - p^{-} _{fem} }{se(p^{-} _{m}-p^{-} _{fem} ) }$

$Se(p_{m} -p_{fem}) = \sqrt{\frac{p_{m}(1-p_{m}) }{n_{m} }+\frac{p_{fem} (1-p_{fem} )}{n_{fem} } }$

$Se(p_{m} -p_{fem}) = \sqrt{\frac{0.3301(1-0.3301) }{530 }+\frac{0.3791(1-0.3791)}{575} }$

$Se(p_{m} ^{-} - p^{-} _{fem} ) = \sqrt{0.000826} = 0.0287$

The test statistic

$Z = \frac{0.3301-0.3791}{0.02875}$

Z = -1.7043

|Z| = |-1.7043|

The tabulated value Z₀.₉₅ = 1.96

The calculated Z= 1.7043 < 1.96 at 0.05 level of significance

The null hypothesis is accepted

<u><em>Conclusion:-</em></u>

The evidence suggest not a higher proportion of females are annoyed by this behavior

4 0

3 years ago