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
Zarrin [17]
3 years ago
6

200 elementary school students were surveyed to find their blood groups. Of those, 55 were of blood group A, 85 of blood group B

, and 21 of blood group O. What is the probability that a randomly chosen student has either blood group A or blood group B? A) 0.25 B) 0.60 C) 0.70 D) 0.81
Mathematics
1 answer:
miss Akunina [59]3 years ago
4 0
C)0.70 becasue 140 is 70% of 200
You might be interested in
Cars are made in a factory at a rate of 39 cars every 3hours at this rate, how many cars can be made on the factory in 7 hours
Mumz [18]

Answer:

Step-by-step explanation:

39 cars every 3 hrs.......that means (39/3) = 13 cars every hr

and if its 13 cars every hr....in 7 hrs, there will be (7 * 13) = 91 cars <==

you can either do it that way....the unit rate way...OR

you can set it up as a proportion...

39 cars to 3 hrs = x cars to 7 hrs...

39 / 3 = x / 7....cross multiply

(3)(x)= (39)(7)

3x = 273

x = 273/3

x = 91 <====

either way, u get the correct answer

8 0
3 years ago
best answer will be awarded the brainliest and 5 stars please evaluate 6/2 and remember to show your work
Svet_ta [14]
6/2 is the number 6 being divided in half by 2; to figure this out just count your 2 table factors! Shown work:

2 x 2 = 4
2 x 3 = 6!

So 6 divided by 2 (6/2) is just the oppoposite of 2 x 3 = 6
8 0
3 years ago
A certain amount of money is divided among Rio, Kim and Leo in the ratio 5:7:3. If Leo gets Php 24,000.00, how much is the total
cricket20 [7]

Answer:

120,000

Step-by-step explanation:

Let's say Rio gets 5x, Kim gets 7x, and Leo gets 3x. In the ratio 5:7:3:1, x = 1

5x + 7x + 3x = total = 15x

3x = 24000

divide both sides by 3 to get x

x = 8000

15x = 8000*15 = 120000

5 0
2 years ago
What is the measure of
Anna007 [38]
It’s A trust me I just did it
8 0
3 years ago
How to substitute x=-2 and x=5 into 2x^2+6-20=0 to check my work
Komok [63]
First answer (x=-2)
...
(2)[(-2)^2]+6-20
2(4)+6-20
8+6-20
14-20
<em>-6 (answer)
</em><em>
</em><em />Second answer (x=5)
...
(2)[(-5)^2]+6-20
2(25)+6-20
50+6-20
56-20
<em>36 (answer)
</em>Hope this helps!
4 0
3 years ago
Other questions:
  • Find parametric equations for the line through (3, 1, 4) that is perpendicular to the plane x ? y + 2z = 9. (use the parameter t
    9·1 answer
  • For several years, Graham has gathered data on students who own a computer and on their performance on a typing-speed test. He c
    8·1 answer
  • How many centimeters in<br> 8.9 meters?
    10·1 answer
  • whats the answer to at the beach, you would like to fill 5 buckets with seashells. you have 8minutes to do so. if you set a stea
    11·1 answer
  • Graph the image of R(-9,0) after a rotation 180° counterclockwise around the orgin?​
    5·1 answer
  • Vassil rounded to the nearest half to estimate the product of Five-eighths and StartFraction 8 over 9 EndFraction. How do the es
    12·2 answers
  • What's the domain and range of f(x)=2/3x-3
    10·1 answer
  • A box plot is shown. The left-most point on the plot is 20 and the right-most point is 95. The box is labeled 35 on the left edg
    8·2 answers
  • The profit of a certain refrigerator is 35% of the cost price. If the profit is $280, find
    14·1 answer
  • 60
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!