1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dezoksy [38]
3 years ago
13

Mr.Montgomery's class, there are 8 boys and 12 girls.If Mr.Montgomery selects 1 student from his class at random, what is the pr

obability that the student will be a girl?
Mathematics
1 answer:
Gnoma [55]3 years ago
7 0
Probability=number of specific outcomes / total possible outcomes

P(g)=12/(12+8)

P(g)=12/20

P(g)=3/5
You might be interested in
1+1
Bezzdna [24]

Answer:

2

Step-by-step explanation:

Well you should count with fingers, one finger and one finger, two fingers

8 0
3 years ago
Read 2 more answers
The vertex angle of an isosceles triangle measure 40.whats the measure of the base angle?
Eddi Din [679]
I don't know if my answer is completely correct, but I think it's 100. All triangles add up to 180, and an isosceles triangle has 2 equal sides. 40 would be the 2 sides, and 180 subtracted from 80 equals 100.
7 0
3 years ago
Read 2 more answers
2−1/2n=3n+16<br><br> ​<br><br> n=3n+16
romanna [79]

Answer:

The answer is

n=5 3/5

Step-by-step explanation:

first collect the like terms:

2-1/2n=3n+16

then...

3n-1/2=16-2

==2 1/2n = 14

===n=5 3/5

3 0
3 years ago
Consider the following hypothesis test. : : The following results are for two independent samples taken from two populations. Ex
I am Lyosha [343]

Answer:

z = -1.53 --- test statistic

p = 0.1260 --- p value

Conclusion: Fail to reject the null hypothesis.

Step-by-step explanation:

Given

n_1 = 80     \bar x_1= 104   \sigma_1 = 8.4

n_2 = 70    \bar x_2 = 106    \sigma_2 = 7.6

H_o: \mu_1 - \mu_2 = 0 --- Null hypothesis

H_a: \mu_1 - \mu_2 \ne 0 ---- Alternate hypothesis

\alpha = 0.05

Solving (a): The test statistic

This is calculated as:

z = \frac{\bar x_1 - \bar x_2}{\sqrt{\frac{\sigma_1^2}{n_1} + \frac{\sigma_2^2}{n_2} }}

So, we have:

z = \frac{104 - 106}{\sqrt{\frac{8.4^2}{80} + \frac{7.6^2}{70} }}

z = \frac{104 - 106}{\sqrt{\frac{70.56}{80} + \frac{57.76}{70}}}

z = \frac{-2}{\sqrt{0.8820 + 0.8251}}

z = \frac{-2}{\sqrt{1.7071}}

z = \frac{-2}{1.3066}

z = -1.53

Solving (b): The p value

This is calculated as:

p = 2 * P(Z < z)

So, we have:

p = 2 * P(Z < -1.53)

Look up the z probability in the z score table. So, the expression becomes

p = 2 * 0.0630

p = 0.1260

Solving (c): With \alpha = 0.05, what is the conclusion based on the p value

We have:

\alpha = 0.05

In (b), we have:

p = 0.1260

By comparison:

p > \alpha

i.e.

0.1260 > 0.05

So, we fail to reject the null hypothesis.

4 0
2 years ago
8. A statement of an employee's biweekly earnings is given below.
Bas_tet [7]

Answer:

a. $852.96

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Can someone help me please ? Thanks!
    8·2 answers
  • SIMPLIFY
    8·1 answer
  • Please i really need help!​
    12·1 answer
  • How do this pleassssse
    5·1 answer
  • 4w^2+49=-28w solve for w<br><br> plz answer
    15·1 answer
  • What are these number rounded to the nearest whole number<br> 74.542 and 63.73
    10·2 answers
  • Write an equation of a line with the given slope and y-intercept.<br><br> m = , b = 2
    13·1 answer
  • 3. if u get this right i’ll give u brainliest
    7·1 answer
  • Which property is shown by -6+0=-6?
    5·1 answer
  • Help me with Math. <br><br> What should be the slope intercept form if m = 8 and b = 6?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!