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
jeka57 [31]
3 years ago
10

The probability of being a girl in this class is 4/7 and there are 12 boys. Find the total number of students.

Mathematics
1 answer:
vladimir1956 [14]3 years ago
3 0

Answer: 28 students

Step-by-step explanation:

The probability of being a girl is 4/7 which means that the probability of being a boy is 3/7 as the fractions must add up to 1.

Assuming the number of people in class is x then the following expression can be used to solve for it;

\frac{3}{7} x = 12\\\\3x = 12 * 7\\\\x = \frac{12 * 7 }{3} \\\\x = 28

You might be interested in
What us the volume of this?
ExtremeBDS [4]
Break down the figure into 2 parts. Then use volume formula and multiply.
V=lwh
V=3x3x2
V=18ft^2

V=lwh
V=2x2x3
V=12ft^2
Then simply add.
  18
+12
-------
  30
5 0
3 years ago
Read 2 more answers
On a 15 hour trip, Rob drove 35% of the time and Mark drove the remainder of the time. How many hours did Mark drive? Explain 9.
Zigmanuir [339]

Answer:

9.75 hours

Step-by-step explanation:

If Rob drove 35% of the time and Mark drove the remainder of the time, the total is 100 %

100-35 = 65

so Mark drove 65% of the time

The total time driven was 15 hours, so we multiply the total time driven by the percentage of time that Mark drove to find the number of hours that Mark drove.

15 * 65%

15*.65

9.75 hours

7 0
3 years ago
If f(x) = │(x² – 50)│, what is the value of f(-5)<br> ?
Tju [1.3M]
Have a nice day :)
_______________

6 0
3 years ago
Read 2 more answers
I need help with these questions
m_a_m_a [10]

Answer:

1. -14

2. v=10

Step-by-step explanation:

1.

- 22= - 8+k

-k-22=-8

-k=-8+22

-k=14/(-1)

k=-14

6 0
3 years ago
In a 30-60-90 triangle, the length of the hypotenuse is 6. What is the length of the shortest side?
Vadim26 [7]

Answer:

<em><u>The Length Of Shortest Side Would Be 3.</u></em>

<em><u>In Case Of 30-60-90 triangle, the length of the shortest side is half of that of hypotenuse .</u></em>

  • <em><u>Hope it helps..</u></em>
3 0
2 years ago
Other questions:
  • Find the 12th term of the following geometric sequence.<br> 3, 12, 48, 192
    12·1 answer
  • The three sides of a triangle are 4cm, 6cm and 8cm.
    7·1 answer
  • An aquarium measures 11 feet wide, 10 feet long and 7 feet deep. Approximately how many gallons of water does it hold if there a
    11·1 answer
  • Which value for the number makes the statement true? the quotient of a number and five is 8. a-4, b-8, c-40, d-80
    7·1 answer
  • Are irrational numbers always/sometimes/never rational number?
    6·1 answer
  • What is 80, 023 written in scientific notation? send help bbys. ​
    13·1 answer
  • Can someone help finds the area of this figure
    10·1 answer
  • What is 6 +0.2 + 0.09 written in standard form? A 0.629 B 6.029 C 6.209 D 6.29<br>​
    15·1 answer
  • Y=2x-1<br><br> 3x+5y=34 <br><br> X=<br> Y=
    10·1 answer
  • A) suppose {u,v,w} spans the vectore space V.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!