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VikaD [51]
3 years ago
9

Probability:

Mathematics
1 answer:
HACTEHA [7]3 years ago
6 0
A: We want to select one person who works out three days a week. Our probability is simply 12/80 ~~ 15%

B: At least 4 days a week means 4 days, 5 days, or 6 days.
Hence, we have: (9 + 20 + 8)/80 = 46%

C: At least once a week.
Let's find out how many DO NOT work out and subtract that from our sample space. This means they must work out at least once a week.

(80 - 15)/80 = 81%
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Solve for x. Show your work or explain your answer.
Alja [10]
X=2
x=15
4x+1=9
-1 -1
4x=8
4/4x=8/4=2

x/5-1=2
+1 +1
x/5=3
(5) (5)
x=15
8 0
3 years ago
The population of at a town has grown 2% each year. In 1998, the population of the town was about 10,000 people. What was the po
Nuetrik [128]

Answer:

10200

Step-by-step explanation:

This is an example of a compound interest. The equation for this problem is 10000*(1+2/100)^n. The n is the year as 1999 is 1 year away from 1998, you just replace n with 1 and you have a simple equation.

7 0
3 years ago
F A taxicab company charges $2.80 plus $0.40 per mile. Carmen paid a fare of $8.80. Enter and solve an equation to find the numb
lisabon 2012 [21]

Answer:

15 miles

Step-by-step explanation:

8.80-2.80=6

6/0.40=15 miles

7 0
3 years ago
Read 2 more answers
Lannie ordered 12 copies of the same book for his book club members. The book cost $19 each and the order has a$15 shipping char
ad-work [718]

(12*19)+15=228+15=243

The total cost is $243.

4 0
3 years ago
Read 2 more answers
A student earned grades of 84, 78, 84, and 72 out of 100 on her four regular tests. She scored 78% on the final exam and 86% on
adelina 88 [10]

If the student received marks of 84, 78, 84, and 72 on her four normal tests, her weighted mean grade is 81.2 percent.

<h3>What is mean?</h3>

The mean is described as a single number that indicates either the closed value for each item in the collection of data or the mean value for the whole set of data.

On her four regular tests, a student had grades of 84, 78, 84, and 72 out of 100. She received 86 percent on her class projects and 78 percent on the final test.

You may compute the weighted mean as follows:

\rm W_m= 0.4 \times ( \frac{84+78+84+72}{4} )+0.3 \times 78 +0.1 \times 86 + 0.2 \times 87 \\\\ W_m=  81.2 \%

Hence, if the student had marks of 84, 78, 84, and 72 on her four normal tests, her weighted mean grade would be 81.2 percent.

To learn more about the mean refer;

brainly.com/question/22871228

#SPJ1

5 0
2 years ago
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