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3 years ago

I need help pleaseeeees

Mathematics

1 answer:

Dimas [21]3 years ago

7 0

It represents the y axis and the x axis. hope this helps! :)

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A quality control inspector has drawn a sample of 10 light bulbs from a recent production lot. Suppose 20% of the bulbs in the l

Neko [114]

Answer:

The probability is 0.0008.

Step-by-step explanation:

Let X represents the event of defective bulb,

Given, the probability of defective bulb, p = 20 % = 0.2,

So, the probability that bulb is not defective, q = 1 - p = 0.8,

The number of bulbs drawn, n = 10,

Since, binomial distribution formula,

$P(x=r) = ^nC_r p^r q^{n-r}$

Where, $^nC_r = \frac{n!}{r!(n-r)!}$

Hence, the probability that exactly 7 bulbs from the sample are defective is,

$P(X=7)=^{10}C_7 (0.2)^7 (0.8)^{10-7}$

$=120 (0.2)^7 (0.8)^3$

$=0.000786432$

$\approx 0.0008$

6 0

3 years ago

Adam and.his dad share the cost of the meal in the ratio of 2:3 adams dad pays 52.50 what is the to cost of the meal?

larisa86 [58]

Adam pays for 2/5 of the meal so his father pays for 3/5

3/5 = 52.50
1/5 = 52.50 / 3 = 17.50

so cost of the meal = 5 * 17.50 = $87.50

7 0

3 years ago

2 over 5 x= 10 solve for x show your work

Sphinxa [80]

$\frac{2}{5}x= 10$

We need to solve for x

To get x alone we need to remove the denominator 5

To remove denominator 5 we multiply by 5 on both sides

$5*\frac{2}{5}x= 10*5$

2x = 50

2x means 2 times x

2 is multiplied with x. so to remove 2 we divide by 2

$\frac{2x}{2}= \frac{50}{2}$

So x= 25

8 0

3 years ago

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What is 1+1?<br> Thanks the question<br> Is worth 50 points

VMariaS [17]

Answer:

1 + 1 = 2

Step-by-step explanation:

8 0

3 years ago

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Roderick wants to draw a circle for which the numerical value of the circumference is greater than the value of the area. Which

Dima020 [189]

The best way to justify which answers are correct are to calculate the circumference and the area for each of the circles with the given radii. I organized this information into a chart.

Circumference | Area

1/2 3.14 0.785

1 6.28 3.14

1 1/2 9.42 7.065

2 12.56 12.56

2 1/2 15.7 19.625

The first three choices will result in a numerical value for the radius that is smaller than the area.

4 0

4 years ago

Read 2 more answers