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kompoz [17]
3 years ago
12

Let x denote the number of defective light bulbs in a randomly selected 20-count box from a local hardware store. The variable x

has the following probability distribution:
x 0 1 2
P(X) 0.28 0.37 0.22 0.08 0.05
Calculate and interpret ox
A. 0.22; if we were to select many boxes of bulbs randomly, we would expect about 0.22, on average, to contain defective bulbs
B• 1.25, if we were to select many boxes of bulbs randomly, we would expect about 1.25, on average, to contain defective bulbs
C.0.28; if we were to select many boxes of bulbs randomly, we would expect about 0.28 to have no defects
D.1.099, if we were to select many boxes of bulbs randomly, the number of defective bulbs would typically vary about 1.099 from the mean
1.208; if we were to select many boxes Bulbs randomly, the number of defective bulbs would typically vary about 1.208 from the mean
Mathematics
1 answer:
Molodets [167]3 years ago
8 0

Answer:

B

Step-by-step explanation:

because it make the most sense

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Answer:

  a) (x³ -x² +x +2) +2/(x+1)

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Step-by-step explanation:

Polynomial long division is virtually identical to numerical long division, except that the quotient term does not require any guessing. It is simply the ratio of the leading terms of the dividend and divisor. As with numerical long division, the product of the quotient term and the divisor is subtracted from the dividend to form the new dividend for the next step.

The process stops when the dividend is of lower degree than the divisor.

In part (a), you need to make sure the dividend expression has all of the powers of x present. This means terms 0x³ and 0x² must be added as placeholders in the given dividend. They will become important as the work progresses.

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Dmitry [639]
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3 years ago
What is the y-coordinate of the point that divides the directed
e-lub [12.9K]

Answer:

(D)5

Step-by-step explanation:

Given the point J(-3,1) and K(8,11).

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In the given case:

(x_1,y_1)=(-3,1), (x_2,y_2)=(8,11), m:n=2:3

Since we are to determine the y-coordinate of the point that divides JK into a ratio of 2:3, we have:

\dfrac{my_2+ny_1}{m+n}=\dfrac{2*11+3*1}{3+2}\\\\=\dfrac{22+3}{5}\\\\=\dfrac{25}{5}\\\\=5

The y-coordinate of the point that divides the directed  line segment from J to K into a ratio of 2:3 is 5.

The correct option is D.

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Or the past 100 years, the average high temperature on october 1 is 78° with a standard deviation of 5°. what is the probability
valina [46]

Answer:

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Step-by-step explanation:

To calculate this, we shall be needing to calculate the z-scores of both temperatures

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z-score = (73-78)/5 = -5/5 = -1

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P(-1 <z <1 )

Mathematically, this is same as ;

P(z<1) - P(z<-1)

Using the normal distribution table;

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