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
VARVARA [1.3K]
3 years ago
11

A math teacher gave her students two tests. On the first test, 80% of the class passed the test, but only 30% of the class passe

d both tests.
What is the probability that a student passes the second test, given that they passed the first one?




0.256

0.375

0.500

0.625
Mathematics
1 answer:
zimovet [89]3 years ago
5 0

Answer:

0.375 is answer

Step-by-step explanation:

Given that the  math teacher gave her students two tests. On the first test, 80% of the class passed the test.  But only 30% of the class passed both tests.

Let A - the students pass I test

B = students pass second test

Then P(A) = 80%=0.8 and P(AB) = 30% =0.30

Required probability =probability that a student passes the second test, given that they passed the first one

= P(B/A) = P(AB)/P(A)

= 0.30/0.80

=3/8

=0.375

Right answer is 0.375


You might be interested in
Find the area of the shaded region
kari74 [83]

Answer: To find the area of the shaded region :

Calculate the area of both shapes. The area of a rectangle is determined by multiplying its length times its width. The area of a circle is Pi (i.e., 3.14) times the square of the radius. Find the area of the shaded region by subtracting the area of the small shape from the area of the larger shape.

Step-by-step explanation: I cannot see the picture to answer your question but I hope this helps you find put your answer. :)

5 0
3 years ago
Read 2 more answers
Factorise the following.​
jok3333 [9.3K]

Answer:

iii. (l + m - n)(l - m + n)

vi. (5a -b) ( 5b - a)

Step-by-step explanation:

iii. l² - (m - n)²

= (l + m - n)(l - m + n)

vi. 4(a+b)² - 9(a-b)²

= (2(a+b))² - (3(a-b))²

= (2(a+b) + 3(a-b)) (2(a+b) - 3(a-b))

= (2a+2b + 3a - 3b) (2a+2b - 3a + 3b)

= (5a -b) ( 5b - a)

7 0
3 years ago
Read 2 more answers
Find the missing side
vazorg [7]
The answer is 7m because if you look at the measurements of the left triangle, they are multiplied by 3 to get the measurements on the right side.
4 0
3 years ago
Which ordered pair is the best estimate for the solution of the system of equations?
Rasek [7]

Answer:

<u>The ordered pair of the solution is (0.022, -0.55). None of the alternatives given we can consider as the best estimate because there isn't at least one positive value for x, when it's actually positive. Picking (0, -2) as the best estimate is also far from the best estimate.</u>

Step-by-step explanation:

Let's solve the system of equations:

y = −25x

−2y = 5x+1

***********************

Substituting y in the 2nd equation:

-2 (-25x) = 5x + 1

50x = 5x + 1

45x = 1

x = 1/45

x = 0.022

**********************

Solving for y in the 1st equation:

y = -25 (0.022)

y = - 0.55

<u>The ordered pair of the solution is (0.022, -0.55). None of the alternatives given we can consider as the best estimate because there isn't at least one positive value for x, when it's actually positive. Picking (0, -2) as the best estimate is also far from the best estimate.</u>

6 0
3 years ago
“ I need help before 10:30 please help . Thank u
White raven [17]

Answer:

The answer would be B.

Step-by-step explanation:

So what you would do is take 500 time each month that each deposit is made.

8 0
3 years ago
Other questions:
  • Is 5/6 close to 1, 0, or 1/2. Explain
    9·1 answer
  • The roots of $3x^2 - 4x + 15 = 0$ are the same as the roots of $x^2 + bx + c = 0,$ for some constants $b$ and $c.$ Find the orde
    9·2 answers
  • What is the solution to 4 to the 3rd power =y
    9·1 answer
  • What equivalent to 6/1
    7·1 answer
  • What does 1 - 0.0098 equal?
    7·1 answer
  • Please help, i gotta get my grade up
    14·1 answer
  • Manuel exercises more than 50 minutes per day. Use t to represent Manuel's amount of exercise (in minutes per day).
    6·1 answer
  • -1859/16= -7(33/8x - 7/4) + 3/2
    10·1 answer
  • What is the solution to this system of equations?<br> 5x + 2y = 29 <br> x + 4y = 13
    6·2 answers
  • F – 5.2 1.6 <br><br> answer pls
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!