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wariber [46]
3 years ago
15

Hi may someone help me out with this please

Mathematics
1 answer:
Over [174]3 years ago
5 0
37.28 mph

I just used an online converter :D
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In a statistics class there are 18 juniors and 10 seniors; 6 of the seniors are females and 12 of the juniors are males. If a st
White raven [17]

Answer:

a) 0.857

b) 0.571

c) 1

Step-by-step explanation:

Based on the data given, we have

  • 18 juniors
  • 10 seniors
  • 6 female seniors
  • 10-6 = 4 male seniors
  • 12 junior males
  • 18-12 = 6 junior female
  • 6+6 = 12 female
  • 4+12 = 16 male
  • A total of 28 students

The probability of each union of events is obtained by summing the probabilities of the separated events and substracting the intersection. I will abbreviate female by F, junior by J, male by M, senior by S. We have

  • P(J U F) = P(J) + P(F) - P(JF) = 18/28+12/28-6/28 = 24/28 = 0.857
  • P(S U F) = P(S) + P(F) - P(SF) = 10/28 + 12/28 - 6/28 = 16/28 = 0.571
  • P(J U S) = P(J) + P(S) - P(JS) = 18/28 + 10/28 - 0 = 1

Note that a student cant be Junior and Senior at the same time, so the probability of the combined event is 0. The probability of the union is 1 because every student is either Junior or Senior.

3 0
3 years ago
Find the slope of the line that contains the points (4,20) and (6,-4)
Y_Kistochka [10]
Slope = (y2-y1) / (x2-x1)
= (-4-20) / (6-4)
= (-24) / (2)
= (-12)

The slope of the line is (-12)
4 0
2 years ago
Im not sure if i did it correct can someone help 5 minutes left
never [62]

Answer:

i believe the answer is a

Step-by-step explanation:

8 0
3 years ago
Is the following sequence arithmetic? If so, what is the common difference?
lozanna [386]

Answer:

c.

Hope this helps!

Sorry if its the wrong answer. =(

7 0
3 years ago
Do the ratios 9/6 and 2/1 form a proportion
valina [46]

Answer:

This is not a proportion

Step-by-step explanation:

Set up a proportion

9/6 = 2/1

Check with cross products

9*1 = 6*2

9 = 12

This is not true so they are not proportional

3 0
3 years ago
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