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
NeTakaya
3 years ago
14

Sarah has two tests at school next week, a math test and a physics test. Let A represent the event that she passes her math test

and B represent the event that she passes her physics test. If A and B are independent events with P(A)=0.30 and P(A AND B)=0.21, find P(B)
Mathematics
1 answer:
koban [17]3 years ago
3 0

Answer:

P(B)=0.7

Step-by-step explanation:

When the events do not affect each other, they are known as independent events. In other words, two events are independent if the outcome of the second event is not affected by the outcome of the first event.

If A and B are independent events, the probability that both events will occur is the product of the probabilities that the individual events will occur:

P(A and B)= P(A)*P(B)

In this case, P(A and B)= 0.21 and P(A)= 0.30

Replacing:

0.21=0.30*P(B)

Solving:

\frac{0.21}{0.30} =P(B)

<u><em>0.7=P(B)</em></u>

You might be interested in
If a cube measures 5.3 cm on each side and has a mass of 280 grams how much is its volume​
OlgaM077 [116]

Answer:

8.1 g/cm

Step-by-step explanation:

3 0
3 years ago
A potter works 4 days a week, makes 15
nataly862011 [7]
It is 3.75 for the answer



8 0
3 years ago
Read 2 more answers
Make t the subject of 5(t − g) = 2t + 7
Alla [95]

Answer:

5(t - g) = 2t + 7 \\ 5t - 5g = 2t + 7 \\ 5t - 2t = 7 + 5g \\ 3t = 7 + 5g \\ t =  \frac{7 + 5g}{3}

5 0
3 years ago
A snorkeler dives for a shell on a reef. After entering the water, the diver descends 11/3 feet in one second. Write an equation
True [87]

x^2 -12x +11

We have the x intercepts so we can create the equation (x-1)(x-11).  Multiply it and you get your answer

5 0
3 years ago
Read 2 more answers
1:
bixtya [17]

Answer:

First day: 45x +20y = 875

Second day: 25x + 40y = 775

Adult ticket price: $15

Step-by-step explanation:

See paper attached. (:

8 0
3 years ago
Other questions:
  • PLEASE ANSWER QUICK
    15·1 answer
  • Please help me idk what this is
    8·2 answers
  • If a+bi is a zero of a function and the coefficients of the polynomial are real, what will be the other complex zero of the func
    6·1 answer
  • (25^1/2 x^5) (4x^-6)
    7·2 answers
  • Which is the graph of y = 2.5x?<br><br> A.<br><br><br> B.<br><br><br> C.<br><br><br> D.
    10·1 answer
  • A semi circle will be rotated 360 about its straight edge. What three dimensional solid will be created as a result of the rotat
    7·2 answers
  • Last question please help me!!!!!!!
    8·1 answer
  • Two spinners are equally divided into red, blue, yellow, and green. Marcus and Jenny each spin one spinner at the same time. Wha
    14·2 answers
  • 2. The fabric wall hanging has an area of
    13·2 answers
  • Vector u has its initial point at (21,12) and its terminal point at (19,-8). Vector v has a direction opposite that of u, whose
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!