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
Crazy boy [7]
3 years ago
5

A math class has 3 girls and 9 boys in the seventh grade and 7 girls and 3 boys in the eighth grade. The teacher randomly select

s a seventh grader and an
eighth grader from the class for competition. What is the probability that the students she selects are both girls?
Write your answer as a fraction in simplest form.
Mathematics
1 answer:
vladimir1956 [14]3 years ago
8 0

Answer:

7/40

Step-by-step explanation:

There are 3 girls+9 boys = 12 students in the 7th grade

P (girl in 7th grade) = girls/ total

                                = 3/12 = 1/4

There are 7 girls+3 boys = 10 students in the 8th grade

P (girl in 8th grade) = girls/ total

                                = 7/10

P(7th grade girl, 8th grade girl) = 1/4 * 7/10 = 7/40

You might be interested in
1/2(x+4)=-12 help me please
skad [1K]
1/2(x + 4) = -12

1/2x + 2 = -12

1/2x = -10

x = -20
5 0
3 years ago
The difference of two positive numbers is 69. The quotient obtained on dividing one by the other is 4. Find the number.​
valentinak56 [21]

Answer:

x=92 y=23

Step-by-step explanation:

Let them be x and y respectively

so given

x-y=69

and

x/y=4  x=4y

so we can write

x-y=69

as

4y-y=69  3y=69 y= 69/3 = 23

now y is 23

so putting in any equation will give the value of x

so

x-23=69 x=92

6 0
2 years ago
Someone help me solve
Lady_Fox [76]
First draw sloping up (steep because he’s running)to the right until you hit 20 on the y axis. Next draw down and to the right for 5 yards until 15 on y axis. Next is a flat horizontal line for 3 seconds on x axis. Finally a shallow slope line down (because he is walking) and right until you hit the x axis.
3 0
3 years ago
Ms. Turner takes 5 hours to drive 390 kilometers from her home to the next city.
Zarrin [17]

Answer:

Step-by-step explanation:

2 hours × 60 km/hour = 120 km

390-120  = 270 km remaining

270 km/(3 hours) = 90 km/hour

5 0
3 years ago
Find the volume of a cone with a base diameter of 12 m and a height of 10 m.
dexar [7]

Answer:

=376.8 m^{3}

Step-by-step explanation:

V=nr^{2}  \frac{h}{3}  Where V is the volume , r is the radius and h is the perpendicular height .

r = \frac{12}{2} m=6

h = 10m

n=3.14

v= 3.14 * 6*6 *\frac{10}{3}

=376.8 m^{3}

5 0
2 years ago
Other questions:
  • HELP HELP HELP PLEASE HELP!!!!!!!!!!!!!! I NEED HELP!!!!!!!!!!!!!!!!!! I need this question answered ASAP!!! I need my grade to
    5·1 answer
  • A tortoise is walking in the desert. It walks at a speed of 3 meters per minute for 7.5 meters. For how many minutes does it wal
    8·2 answers
  • PLZPLZPLZ HELP ME!!!
    10·1 answer
  • A 95% confidence is given by (15,20) . The interval is based on a sample of size n=25 .
    8·1 answer
  • Which of the following cars is traveling at the fastest rate of speed?
    12·2 answers
  • Like segment PLEASE HELP MEEEEEE
    10·2 answers
  • Do you guys know this one if so comment the down the answers that all apply in the can't tysm!
    13·2 answers
  • Given: 3c + d = f + g, d = f, g = c + 8 Prove: c = 4
    10·1 answer
  • What is the next term of the arithmetic sequence? 3,9,15,
    6·1 answer
  • Solve log x = 3.<br> x = 10,000<br><br> x = 3<br><br> x = 30<br><br> x = 1,000
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!