MATHEMATICS MIDDLE SCHOOL

True or False: 3( 12-8 ) ______
2.5-4 = 2

Answers

Answer 1
Answer:

Answer: False

Step-by-step explanation:

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What is 78/500 simplify down to?

A local flower shop is selling $1 raffle tickets and is donating all proceeds to the children's hospital. They sold 5,500 tickets and plan to give away 20 flower arrangements valued at $70 and 20 gift certificates valued at $25. Find the expected value of purchasing a raffle ticket.Round to the nearest cent. Do not round until the final calculation.

Answers

The expected value of purchasing a raffle ticket is -0.647.

What is the Expected Value of a Probability & Statistical  Analysis?

The expected value is derived in probability analysis by the multiplication of each of the potential possibilities by the likelihood that each result will occur and then adding all of those values together.


Using the formula below, we can calculate the expected value as follows:

\mathbf{ E(X)= \sum^(n)_(i=1)X_i P(X_i)}

However, the probability (Pr) of each event can be categorized as follows:

  • Pr (to win a flower arrangement ) \mathbf{=(20)/(5500)}

  • Pr (to gift a certificate) \mathbf{=(20)/(5500)}

  • Pr (no win) ) \mathbf{=(5500 - 20 - 20)/(5500)=(5460)/(5500)}

Thus;

\mathbf{E(X) = 70((20)/(5500) * 25 (((20)/(5500) )- 1((5460)/(5500) )}

\mathbf{E(X) =-0.647}

Learn more about finding the expected value of a probability here:

brainly.com/question/9931880

Answer: The expected value of purchasing a raffle ticket would be $0.3449.

Step-by-step explanation:

Since we have given that

Number of tickets = 5500

Number of flower arrangements = 20

Number of gift certificates = 20

So, Probability that wining $70 at flower arrangement = (20)/(5500)=(1)/(275)

Probability that wining $25 at gift certificates = (20)/(5500)=(1)/(275)

So, Expected value of purchasing a raffle ticket would be

70* (1)/(275)+25* (1)/(275)\n\n=0.254+0.0909\n=\$0.3449

Hence, the expected value of purchasing a raffle ticket would be $0.3449.

Multiply with regrouping 73x28

Answers

72x28
the first digit 2 in 72 times the first digit 8 in 28 equal 16
leave the 6 and carry the 1 over 7
8 times 7 equal 56 and so far your first answer is 566 your answer is

2016 just like this new year

How many ones are in 7 thousands

Answers

there are 7000 ones in 7 thousands
7 thousands= 7,000= 7,000 ones.

The final answer is 7,000 ones~

The manager of a public pool is counting the people who came to swim in June and July. There were 600 people who came in June. There were 800 people who came in July. What is the percent increase in people who came from June to July?25%


200%


3313%


75%

Answers

So,

The percent increase is basically the same as percent decrease except that you subtract the June count from the July count.  If you let x be the June count and y be the July count, you can write it mathematically as follows:
(y -x)/(x) = percent\ increase

Substitute.
(800 - 600)/(600) = percent\ increase
(200)/(600) \ or\ (1)/(3) = percent\ increase

The percent increase in people from June to July is 33.3333333%, which is not one of the options you put there.

Answer: 33 1/3

Step-by-step explanation:

For ttm i know it's right

PLEASE HELP!!! Which of the following is a correct conversion of 50 kg?A. 5,000 g
B. 50,000 mg
C. 50,000 g
D. 5,000,000 mg

Answers

50kg * 1000g/kg = 50,000g
C. 50,000g

Max tossed a fair coin 3 times. What is the probability of getting heads in the first two trials and tails in the last trial?

 

 

Answers

When you toss a coin 3 times here is what can happen:
H=heads
T= Tails
HHH                        TTT
HHT                        TTH
HTH                        THT
HTT                        THH
Since 8 things can happen and only one of them is what you want, the probability is 1/8
Another way to think about it is each toss has 1/2 of coming up as you want it to.
Three tosses are 1/2 x 1/2 x 1/2 which is 1/8
                   
P\left( E \right) =\frac { 1 }{ 2 } * \frac { 1 }{ 2 } * \frac { 1 }{ 2 } =\frac { 1 }{ 8 }

You could get this answer by creating a tree diagram or by thinking about the possibilities that exist.

Realm of possibilities with one toss:

H or T.

Realm of possibilities with two tosses:

H, H
H, T
T, H
T, T

Realm of possibilities with three tosses:

H, H, H
H, H, T <--- 1/8 chance of taking place
H, T, T
T, T, T
T, T, H
T, H, H
T, H, T
H, T, H
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