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Rom4ik [11]
4 years ago
15

A shipment of 20tvs contains 5 that are defective. if 10 of them are randomly chosen for inspection, what is the probability tha

t 2 out of 10 will be defective?
Mathematics
1 answer:
Elenna [48]4 years ago
5 0
1/4 of the shipment is defective so if half is randomly chosen to test the answer would be 5/20 or 2/10  so 1/4 or 1/5 
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Y=3x-2<br> Y=2x-5<br> Find X and Y using substitution
tiny-mole [99]

y = 3x -2~~~.....(i)\\\\y = 2x-5~~~.....(ii)\\\\\text{Substitute equation (i) in equation (ii):}\\\\3x-2 = 2x -5\\\\\implies 3x -2x = -5+2\\\\\implies x = -3\\\\\text{Substitute}~ x =-3,~ \text{in equation (i):}\\\\y = 3(-3) -2 = -9 -2 = -11\\\\\text{Hence,}~ (x,y) = (-3,-11)

4 0
3 years ago
Does the graph f(x)=-2x^2 -1 have a maximum or a minimum? Explain.
Serga [27]

Answer:

It has a maximum

Step-by-step explanation:

The way I think about it is looking at "a" (the leading variable's coefficient, so __x²), if it's negative, the graph is a frown, but if it's positive, it's a smile. In this case, a is -2, so the graph would have the shape of a frown, which has a maximum.

I hope this helped!

8 0
3 years ago
What is the measure of EFG in 0 0 below?
const2013 [10]

Answer:

C. 300

Step-by-step explanation:

EFG and EG is the total distance around the circle

EFG + EG = 360 degrees

EFG + 60 = 360

Subtract 60 from each side

EFG +60-60 = 360-60

EFG = 300

5 0
3 years ago
Read 2 more answers
The weights of professional wrestlers are approximately normally distributed with a mean of 220 pounds and a standard deviation
nikdorinn [45]

Answer:

1.6%

Step-by-step explanation:

The cumulative distribution function (CDF) of a random variable X is denoted by F(x), and is defined as

F(x) = P(X ≤ x). where x is the largest possible value of X that is less than or equal to x

z = (x-μ)/σ,

where:

x is the raw score = 205

μ is the population mean, = 220 pounds

σ is the population standard deviation = 7 pounds

205 -220/7

z = -15/7

z = -2.1428571429

Using the normal cdf function on your graphing calculator,the cumulative distribution is

normalcdf( -2.1428571429, 100)

= 0.01606229

In percent form = 0.01606229 × 100

= 1.6%

5 0
3 years ago
Help please. Im confused on what to do.
Paraphin [41]

Answer:

add up all the sides!!

6+3+3+3+5+12+4+6=38

so the perimeter is 38 ft

4 0
3 years ago
Read 2 more answers
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