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NikAS [45]
3 years ago
14

Type the correct answer in each box. If necessary, use / for the fraction bar. A bag contains 5 blue marbles, 2 black marbles, a

nd 3 red marbles. A marble is randomly drawn from the bag. The probability of not drawing a black marble is . The probability of drawing a red marble is .
Mathematics
1 answer:
konstantin123 [22]3 years ago
7 0

Answer:

Step-by-step explanation:

Problem One

Blue =   5

Black  =2

Red    = 3

First of all there are 10 marbles, 2 of which are black.

That means that 8 others are not black

You can draw any one of the 8.

P(not black) = 8/10 = 4/5

Problem Two

There are 10 marbles in all

3 of them are red.

P(Red) = 3/10  

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Can someone explain to me how to solve it?
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Step-by-step explanation:

The problem is basically asking for the roots, or the x-intercepts. To do this, follow the quadratic formula:

b is the second coefficient(+13)

a is the first coefficient(5)

c is the third coefficient(-6)

When the formula is negative, it just means to flip the sign from a positive to negative or negative to positive. Plug in and simplify.

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Suppose I’ll define population is all woman and a survey is being conducted. Which of these is an example of selection bias
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Step-by-step explanation:

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3 years ago
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2 years ago
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An arithmetic progression has first term 11 and Fourth term 32. Fine the sum of the first nine term
schepotkina [342]

Let the first term be a, 4th term be a_{4}, difference between terms be d, and sum of first nine terms be S_{9}.

a_{4} = a + 3d

32 = 11 + 3d

3d = 32 - 11

3d = 21

d = 7

S_{9} = \frac{9}{2} (2a + (9-1)d)

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4 0
3 years ago
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A rectangular lamina of uniform density is situated with opposite corners at (0,0) and (15,4). calculate its radii of gyration a
Sphinxa [80]
First, you have to find the moment of inertia along the x and y axes. Constant density is denoted as k.


I_{x}= \int\limits^15_0\int\limits^4_0 {k y^{2} } \, dx  dy= \frac{1}{3}k (15-4)^4=4880.33k

I_{y}= \int\limits^15_0\int\limits^4_0 {k x^{2} } \, dx  dy= \frac{1}{3}k (15-4)^4=4880.33k

Then, the radii of gyration for

x = √[I_x/m]
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where m = k(15-4)² = 121k. Then,

x = y = [4880.33k/121k] = 40.33

I hope I was able to help you. Have a good day.
7 0
3 years ago
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