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
eduard
3 years ago
14

There are 20 children in the cast of a class play, and 8 of the children are boys. Of the boys, 4 have a speaking part in the pl

ay, and of the girls, 8 do not have a speaking part in the play. If a child from the cast of the play is chosen at random, what is the probability that the child has a speaking part?
a)2/5
b)1/2
c)3/5
d)3/4
Mathematics
2 answers:
denpristay [2]3 years ago
4 0

Answer:

A0 2/5

Step-by-step explanation:

First, find out how many girls there are by subtracting 8 (boys) from 20 (total). This means there are 12 girls. Since 8 girls aren't speaking, 4 are. 4+4=8. 8 out of the 20 children are speaking/ 8/20 simplified is 2/5

nikdorinn [45]3 years ago
3 0

Answer: The answer is option A

Step-by-step explanation: the probability that a boy has a speaking part is 4/20

You might be interested in
17. Which of the following is the correct formula for finding power in a DC circuit? A. P = I2R B. P = VR C. P = IR D. P = V2I
netineya [11]

Answer:

Choice A. P = I² · R where

  • P is the power in the DC circuit,
  • I is the current through the circuit, and
  • R is the total resistance of the circuit.

Step-by-step explanation:

Electrical power is the rate at which the electrical force does work. So what is electrical work? That's the work W that the electrical force do when it moves charges Q across a potential difference V:

W = V\cdot Q.

The power is the rate at which the electrical force do the work:

\displaystyle P = \frac{W}{t} = V \cdot \frac{Q}{t}.

On the other hand, current I is the charge through a cross-section of the circuit in unit time. By the definition of current:

\displaystyle\frac{Q}{t} = I.

\displaystyle P =V \cdot \frac{Q}{t} = V\cdot I.

Consider Ohm's Law:

V = I \cdot R.

Therefore

\displaystyle P = V\cdot I = (I \cdot R) \cdot I = I^{2}\cdot R.

6 0
3 years ago
Read 2 more answers
11x26 <br> 49x12<br> 12x25<br><br> Thanks for helping me!
Savatey [412]
286
588
300
:) your welcome
5 0
3 years ago
Read 2 more answers
2. G(x) = 2x² + 3x<br>Is the function even, odd, or neither?​
Bingel [31]
The function appears to be neither odd nor even
8 0
3 years ago
A bank in the Bay area is considering a training program for its staff. The probability that a new training program will increas
WITCHER [35]

Answer:

P(B' \cup A') = P((A \cap B)') = 1-P(A \cap B)= 1-0.32=0.68

See explanation below.

Step-by-step explanation:

For this case we define first some notation:

A= A new training program will increase customer satisfaction ratings

B= The training program can be kept within the original budget allocation

And for these two events we have defined the following probabilities

P(A) = 0.8, P(B) = 0.2

We are assuming that the two events are independent so then we have the following propert:

P(A \cap B ) = P(A) * P(B)

And we want to find the probability that the cost of the training program is not kept within budget or the training program will not increase the customer ratings so then if we use symbols we want to find:

P(B' \cup A')

And using the De Morgan laws we know that:

(A \cap B)' = A' \cup B'

So then we can write the probability like this:

P(B' \cup A') = P((A \cap B)')

And using the complement rule we can do this:

P(B' \cup A') = P((A \cap B)')= 1-P(A \cap B)

Since A and B are independent we have:

P(A \cap B )=P(A)*P(B) =(0.8*0.4) =0.32

And then our final answer would be:

P(B' \cup A') = P((A \cap B)') = 1-P(A \cap B)= 1-0.32=0.68

5 0
3 years ago
8+8-8+16= <br> BAHHAHAHAHA
Olenka [21]

Answer: 24

Step-by-step explanation: thanks

4 0
3 years ago
Other questions:
  • Solve the following system of equations<br> 3X +5Y=16<br> 2X+7Y=7
    10·1 answer
  • When you divide the product of n consecutive integers by a natural number K, the remainder is a positive number. Find the greate
    14·1 answer
  • Given the function f(x) = x² + 3x - 2 What is the average rate of change for the function from 2 to 6? Show your work.
    13·1 answer
  • PLEASE HELP ASAP!! THANK YOU SO MUCH!
    11·2 answers
  • It was 7 degrees below zero in the morning. By afternoon the temperature rose 15 degrees. How warm was it?
    10·2 answers
  • Which situation would be BEST represent by the graph?
    5·1 answer
  • An ion channel can be in either open (O) or closed (C) states. If it is open, then it has probability 0.1 of closing in 1 micros
    13·1 answer
  • Cheena has 3/4 yard of fabric. She cuts the fabric into pieces that are each 1/8yardlong. How many pieces of fabric does cheena
    6·1 answer
  • How do you graph an inequality on a graph?
    6·2 answers
  • 4. will give brainliest
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!