answer.
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
love history [14]
2 years ago
10

A classroom has ten students. Three students are freshman, two are sophomores, and five are juniors. Three students are randomly

selected (without replacement) to participate in a survey. Consider the following events: A = Exactly 1 of the three selected is a freshman B = Exactly 2 of the three selected are juniors Find the following probability. If needed, round to FOUR decimal places. Pr(A∩B) = ___________
Mathematics
1 answer:
ycow [4]2 years ago
3 0

Answer:

0.25

Step-by-step explanation:

We have a total of ten student, and three students are randomly selected (without replacement) to participate in a survey. So, the total number of subsets of size 3 is given by 10C3=120.

On the other hand A=Exactly 1 of the three selected is a freshman. We have that three students are freshman in the classroom, we can form 3C1 different subsets of size 1 with the three freshman; besides B=Exactly 2 of the three selected are juniors, and five are juniors in the classroom. We can form 5C2 different subsets of size 2 with the five juniors. By the multiplication rule the number of different subsets of size 3 with exactly 1 freshman and 2 juniors is given by

(3C1)(5C2)=(3)(10)=30 and

Pr(A∩B)=30/120=0.25

You might be interested in
Am adult ticket at an amusement park cost $24.95 and a child’s ticket costs $15.95. A group of 10 people paid $186.50 to enter t
kifflom [539]

The correct answer is 4 adults


7 0
2 years ago
Read 2 more answers
FWML is a parallelogram. Find the values of x and y. Solve for the value of z, if z=x−y.
Ganezh [65]

Answer:

x = 5, y = 8, z = -3

Step-by-step explanation:

Opposite sides of a parallelogram are congruent so to find x:

x + 7 = 3x - 3

-2x = -10

x = 5

To find y:

y + 2 = 2y - 6

-y = -8

y = 8

Therefore, z = x - y = 5 - 8 = -3.

4 0
2 years ago
85% of a number is added to 24, the result is the same number find the number. ​
hammer [34]

Answer:

160

Step-by-step explanation:

3 0
2 years ago
What is the sum of the infinite geometric series?<br><br> mc010-1.jpg
ra1l [238]
You haven't provided the series, therefore, I can only help with the concept.

<u><em>For an infinite geometric series, we have two possibilities for the common ratio (r):</em></u>
for r > 1, the terms in the series will keep increasing infinitely and the only possible logic summation of the series would be infinity
for r < 1, the terms will decrease, therefore, we can formulate a rule to get the sum of the infinite series

<u><em>In an infinite series with r < 1, the summation can be found using the following rule:</em></u>
sum = \frac{a_{1} }{1-r}
where:
a₁ is the first term in the series
r is the common ratio

<u>Example:</u>
For the series:
2 , 1, 0.5 , 0.25 , ....
we have:
a₁ = 2
r = 0.5
Therefre:
sum = \frac{2}{1-0.5} = 4

Hope this helps :)
4 0
2 years ago
A skating rink charges $0.75 to rent skates and $1.25 per hour to skate. How many hours did Penny skate if she was charged $4.50
ArbitrLikvidat [17]
She was skating for 3 hours.
4 0
2 years ago
Other questions:
  • Jamie has a jar of coins containing the same number of nickels, dimes and quarters. The total value of the coins in the jar is $
    12·2 answers
  • The exterior angle of a regular polygon is one-fifth of its interior angle. How many sides does the polygon have? please answer
    9·1 answer
  • A square with a perimeter of 20 units is graphed on a coordinated grid. The square is dilated by a scale factor of 0.4 with the
    8·2 answers
  • Two triangles are shown to be congruent by identifying a combination of translations, rotations, or reflections that move one fi
    12·2 answers
  • Which method should be used to solve for x?
    15·1 answer
  • A mother is 1 and 3/4 times as tall as her son. Her son is 3 feet tall. How tall is the mother?
    13·2 answers
  • L'età media di Aldo, Bruno, Carlo e Davide è 16 anni. Se non si tiene conto di Davide, l'età media dei tre rimanenti sale a 18.
    5·1 answer
  • The volume of a gas in a container varies inversely with the pressure on the gas. A container of helium has a volume of 370in3 u
    14·1 answer
  • A college is selling tickets to the annual battle of the bands competition. On the first day
    9·1 answer
  • The lunch lady pushes a 100 kg zombie with 300 N of force. How much is the zombie accelerated?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!