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
balandron [24]
3 years ago
11

A proof in which you assume the opposite of what you want to prove is called what?

Mathematics
1 answer:
Taya2010 [7]3 years ago
4 0
Proof<span> by contradiction........... </span>
You might be interested in
At a raffle, 1500 tickets are sold at $2 each. There are four prizes given for $500, $250, $150, and $75. You buy one ticket. Us
wolverine [178]

Answer:

<u>The expected value of every ticket is a loss of $ 1.35</u>

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

Number of tickets sold at the raffle = 1,500

Price of each ticket = $ 2

Total prizes = 1 * $ 500 + 1 * $ 250 + 1 * $ 150 + 1 * $ 75

2. Use a probability distribution table to calculate the expected value of your gain. Your expected value is_____ ?

Let's answer the question using a probability distribution for the gains, this way:

  • Probability of 1st prize of $ 498 (500 - ticket) = 1/1,500
  • Probability of 2nd prize of $ 248 (250 - ticket) = 1/1,500
  • Probability of 3rd prize of $ 148 (150 - ticket) = 1/1,500
  • Probability of 4th prize of $ 73 (75 - ticket) = 1/1,500
  • Probability of losing $ 2 (ticket) = 1,496/1,500

Now, we calculate the mean for all the tickets (winners and non-winners), this way:

Expected value = [(1,496 * -2) + (1 * 498) + (1 * 248) + ( 1 * 148) + ( 1 * 73)]/1,500

Expected value = [- 2,992 +498 + 248 + 148 + 73)/1,500

Expected value = -2,025/1,500 = - 1,35

<u>The expected value of every ticket is a loss of $ 1.35</u>

8 0
4 years ago
How many five card hands can<br> be dealt from a standard deck of<br> 52 cards?
Law Incorporation [45]

Answer:

2

Step-by-step explanation:

7 0
3 years ago
Find the slope of each line.<br><br> PLEASE HELP!!! 15 PTS!!!
leva [86]

Answer:

im pretty sure its -3/2

Step-by-step explanation:

since you have to do rise over run and your falling 3 so its a negative 3 and you always run right so its run 2 so then its -3/2 if its not that sorry

5 0
2 years ago
The ages of three siblings are all consecutive
ankoles [38]

Answer:

12 year old is the youngest sibling

Step-by-step explanation:

Given: The ages of three siblings are all consecutive integers.

           The sum of sibling´s age is 39.

Now, finding the age of youngest sibling.

Lets assume the age of youngest sibling be "x"

As given, The ages of three siblings are all consecutive integers.

∴ Age of 2nd sibling will be (x+1)

 Age of 3rd sibling will be (x+2)

next, forming an equation for the sum of sibling´s age.

⇒x+(x+1)+(x+2)= 39

Opening the parenthesis

⇒ x+x+1+x+2= 39

⇒3x+3= 39

Subtracting both side by 3

⇒3x= 39-3

⇒3x= 36

Dividing both side by 3

⇒x= \frac{36}{3}

∴ x= 12

Subtituting the value of x to find the age of other sibling

∴Youngest sibling age= 12 years

2nd sibling age= 13 years

3rd sibling age= 14 years

Hence, The youngest sibling is 12 years old.

3 0
3 years ago
Jonah's house and his grandparents' house are 8,046.72 meters apart. What is this distance in miles?
Elis [28]

Answer:

5 miles

Step-by-step explanation:

1 meter is 0.000621371 mile

So you multiply

8,046.72 x 0.000621371 = 5


3 0
3 years ago
Other questions:
  • a baseball diamond is a 90ft square. the mound is 60.5 ft from home plate. how far is it from the mound to first base.
    13·1 answer
  • PLEASE HELP WILL GIVE POINTS AND MARK BRAINLIEST PLEASE!!!!!!!!!!!!!
    11·2 answers
  • What is the volume of a square pyramid with a base length of 4 cm and a height of 9 cm?
    7·2 answers
  • How did i travel irf i went from nyc to tren ton a distance of90 miles at45 miles per hour how long did it take
    9·1 answer
  • How do I set up proportion’s and also cross multiply
    8·1 answer
  • Please help, reward good
    15·1 answer
  • Daniels print shop purchased a new printer for $35,000. Each year it depreciates at rate of 5%. How much will the printer be wor
    7·1 answer
  • The amount of matter in an object is its.
    15·2 answers
  • Quad ABCD John Squad ABCD John pillow is translated 3 units to the left to create quad ABCD which statement is true
    9·1 answer
  • 1.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!