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dimaraw [331]
4 years ago
11

Assume that when adults with smartphones are randomly​ selected, 41​% use them in meetings or classes. If 6 adult smartphone use

rs are randomly​ selected, find the probability that exactly 4 of them use their smartphones in meetings or classes.
The probability is
Mathematics
1 answer:
raketka [301]4 years ago
6 0

Answer:

The probability is 0.0179 or 1.79%

Step-by-step explanation:

This is a binomial probability distribution.

The probability of success is

p = 0.41

The probability of failure is

q = 1 - 0.41 = 0.59

Use the formula;

P(X=x)=^nC_xp^xq^{n-x}

where n=6 is the number of trials and x=4 is the number of successes.

This implies that:

P(X=4)=^6C_4(0.41)^4(0.59)^{6}

This simplifies to:

P(X=4) = 0.0179

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Solve: 3x - 1 = 8(x + 1) + 1
amm1812

Answer:

x=-2

Step-by-step explanation:

3x-1=8x+8+1

3x-1 = 8x+9

3x-1+1=8x+9+1

3x= 8x+10

3x-8x=8x+10-8x

-5x=10

-5x ÷-5

10 ÷-5

x=-2

6 0
3 years ago
Please help me answer the question
Rufina [12.5K]

Answer:

y=-x+2

Step-by-step explanation:

The slope-intercept form is y=mx+b where m is the slope and b is the y-intercept.

From the graph, we can see that the y-intercept is at (0,2) so the equation becomes y=mx+2.

Other points on the graph include (1,1) and (2,0). Plugging (1,1) into the slope-intercept equation, we get 1=(m)1+2. Solving this will give us m=-1.

We can confirm this by plugging m=-1 into the equation along with the point (2,0); 0=(-1*2)+2. It checks out!

So our final equation in slope-intercept form will be y=-x+2

4 0
3 years ago
When solving for a variable in an equation, what must be achieved as a final answer?
photoshop1234 [79]

Answer:

D is the correct answer.

Hope it helps!!

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3 years ago
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Suppose that the regression equation y = 16.99 + 0.32 x1 + 0.41 x2 + 5.31 x3 predicts an adult’s height (y) given the individual
umka21 [38]

Answer:

Step-by-step explanation:

It is given that the regression equation

y = 16.99 + 0.32 x_1 + 0.41 x_2 + 5.31 x_3

predicts an adult’s height (y) given the individual’s mother’s height (x1), his or her father’s height (x2), and whether the individual is male (x3 = 1) or female (x3 = 0).

The coefficient of x1 = 0.32 represents the increase in height of the child due to one inch increase in mother.

Similarly coefficient of x2 = 0.42 represents the increase in height of the child due to one inch increase in father.

and coefficient of x3 = 5.31 represents the increase in height of the child due to being a male than a female.

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What is the Square root of 18?<br><br><br><br> ​
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Answer: The square root is: 4.243

Step-by-step explanation:

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3 years ago
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