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grandymaker [24]
4 years ago
12

A number is randomly selected from {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. A is represented by the event that the number picked is grea

ter than 7. What is the probability of the complement of event A?
A.3/10
B.2/5
C.3/5
D.7/10
Mathematics
2 answers:
fomenos4 years ago
7 0
P(A) = P(8) + P(9) + P(10) = 3/10 so P(A complement) = 1 - P(A) = 1 - 3/10 = 7/10 - D
Andreas93 [3]4 years ago
7 0

Answer:

7/10

Step-by-step explanation:

i took quiz. plz give brainliest ;-;

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An angle measures 67.8° more than the measure of a supplementary angle. what is the measure of each angle?
BARSIC [14]
X=the measure of first angle.
Supplementary angle of an angle x=180º-x   (the measure of the second angle)

We solve this equation:

x+67.8=180-x
2x=180-67.8
2x=112.2
x=112.2/2
x=56.1

Supplementary angle of 56.1º=180º-56.1º=123.9º

answer: our angles would be 56.1º and 123.9º
4 0
4 years ago
In the year 2000, the average car had a fuel economy of 22.6 MPG. You are curious as to whether the average in the present day i
Lera25 [3.4K]

Answer:

The appropriate null hypothesis is H_0: \mu = 22.6

The appropriate alternative hypothesis is H_1: \mu < 22.6

Step-by-step explanation:

The average car had a fuel economy of 22.6 MPG. Test if the current average is less than this.

At the null hypothesis, we test if the current average is still of 22.6 MPG, that is:

H_0: \mu = 22.6

At the alternative hypothesis, we test if the current mean has decreased, that is, if it is less than 22.6 MPG. So

H_1: \mu < 22.6

4 0
3 years ago
Please help me. I need to find what W is​
cluponka [151]

Answer:

9

Step-by-step explanation:

w+13-\frac{2w}{3}=16

w · \frac{3}{3} -\frac{2w}{3}+13=16

\frac{w}{3}+13=16

\frac{w}{3}=3

w=9

6 0
3 years ago
If ten coins are spun together, the probability of four or more heads is 0.83. the probability of eight or more is 0.05. find th
aleksklad [387]

Answer:

a. 0.17

b. 0.95

Step-by-step explanation:

The key to answering both questions is that we should understand that the probability of an event happening = 1 - the probability of the event not happening

Firstly, we want to calculate the probability of less than four

Probability of less than four = 1 - probability of four or more heads

that is 1 - 0.83 = 0.17

Probability of less than 8 = 1 - probability of 8 or more = 1-0.05 = 0.95

6 0
3 years ago
There is a mound of g pounds of gravel in a quarry. Throughout the day, 200 pounds of gravel is added to the mound. Two orders o
Delicious77 [7]

Starting amount = g

Throughout the day 200 pounds is added and 1400 pounds is removed ( 700 x 2 = 1400)

Final weight is 1,100 pounds

g + 200 - 1400 = 1100

Simplify:

g - 1200 = 1100

Add 1200 to both sides:

g = 2300 pounds

3 0
2 years ago
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