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cricket20 [7]
3 years ago
14

he table gives the probability distribution of the number of books sold in a day at a bookstore. What is the probability of 16 o

r more books being sold on a given day? number of books sold in a day 0-5 6-10 11-15 16-20 21-25 probability 0.110 0.206 0.464 0.201 ? 0.220 0.201 0.464 0.019
Mathematics
1 answer:
Pepsi [2]3 years ago
4 0
16 or more books sold in a day will include two intervals from the given table:

a) 16 - 20 books sold.
Probability = 0.201

b) 21 - 25 books sold.
Probability = ?

Since the table gives the probability distribution, the sum of all the probabilities must be equal to 1. We are given the probabilities of 4 out 5 intervals. So in order to find the probability of the 5th interval (21-25) we can subtract the sum of probabilities of rest of the intervals from 1.
So, P(21 - 25) = 0.019

In order to find the probability of 16 or more books sold we need to sum the probabilities of both these intervals.

So, the probability of 16 or more books being sold on a given day = 0.201 + 0.019 = 0.220
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Can someone please help? if can include working out​
aalyn [17]

Answer:

Step-by-step explanation:

a. 5 x (c) = -35

Divide each side by 5, which is equal to -6. Remember, two negatives make a positive and one negative and one positive makes a negative.

c. 16/(x) = -4

What times what is equal to a positive 16? To solve, multiply x on both sides of the equation to get 16 = -4x then divide -4 on both sides. You'll get the answer -4. 16/-4 = -4.

e. x/(-3)= -9

Like c, multiply both sides by the denominator, so -3. You'll get x by itself for an equation like x = -9 x -3. Then multiply, remember two negatives equal a positive, so x = 27. 27/-3 = -9.

g. -5000 x y = -10,000

Divide -5000 on both sides to get the equation y = -10,000/-5000. Then solve. y= 2. -5000 x 2 = -10,000.

i. 243/x = -81

Mutiply both sides of the equation by x, so x cancels out. You'll end up getting the equation 243= -81x. Then divide both sides of the equation by -81. Now that we have 1 positive and 1 negative we know our answer has to be negative. The equation should look like 243/-81 = x, which is equal to x=-3. Thus, the answer is 243/(-3)= -81.

k. -92 x y= 184

Divide both sides by -92 to get x by itself. Then you'll get the equation y= 184/-92. y= -2 so, -92 x -2 = 184.

6 0
3 years ago
You are making 8 cups of fruit punch for a party. You have bottles of 75% fruit juice and 25% fruit juice. How many cups of each
slavikrds [6]

Answer:

<em>4 cups of 75% fruit juice and 4 cups of 25% fruit juice should be mixed.</em>

Step-by-step explanation:

Suppose, the amount of 75% fruit juice is x cups.

As the total amount of fruit punch is 8 cups, so the amount of 25% juice will be:  (8-x) cups.

Given that, the percentage of juice in 8 cups fruit punch is 50%

So, the equation will be.........

0.75x+0.25(8-x)= 0.50(8)\\ \\ 0.75x+2-0.25x= 4\\ \\ 0.50x+2=4\\ \\ 0.50x= 2\\ \\ x=\frac{2}{0.50}=4

Thus, the amount of 75% fruit juice is 4 cups

and the amount of 25% fruit juice is (8-4)= 4 cups.

3 0
3 years ago
A restaurant has 75% of its tables being used. Which ratio compares the used tables with all the tables in the restaurant?
Bogdan [553]
75%=75/100=75:100=3/4

4-3=1

1/4=tables not used.

1/4=25/100=25:100

So....25:75 = not used tables : used tables

Hoped I helped!
5 0
3 years ago
Read 2 more answers
I need help like I really dont know how to do this i need help fast
Ganezh [65]

Answer:

44 units² or 44 units squared

There really isn't a preference of units, like inches or meters, so you can add that in.

Step-by-step explanation:

Haha, this is what we're doing in class!

Okay, so the formula for a trapezoid is A= ½ (b1+b2) h

14= b1

8= b2

Add them... You get 22. Multiply that by the height, which is 4. You should get 88. Then divide by 2. You should get 44.

Here's some helpful notes:

I hope this was helpful!

5 0
3 years ago
Help ME out I need help on this Right noww
DanielleElmas [232]
The answer is B and D
6 0
3 years ago
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