# The bar chart

The bar chart shows the results of the math test. How many% of pupils achieved approximately better results than the average of the class?

Diagram: 1-10 pupils, 2-4 pupils, 3-6 pupils, 4-2 pupils, 5-4 pupils.
(lowest result are better)

Result

p =  53.846 %

#### Solution:

$n = 10+4+6+2+4 = 26 \ \\ \ \\ a = \dfrac{ 1 \cdot \ 10+2 \cdot \ 4+3 \cdot \ 6+4 \cdot \ 2+5 \cdot \ 4 }{ n } = \dfrac{ 1 \cdot \ 10+2 \cdot \ 4+3 \cdot \ 6+4 \cdot \ 2+5 \cdot \ 4 }{ 26 } = \dfrac{ 32 }{ 13 } \doteq 2.4615 \ \\ \ \\ p = 100 \cdot \ \dfrac{ 10+4 }{ n } = 100 \cdot \ \dfrac{ 10+4 }{ 26 } = \dfrac{ 700 }{ 13 } \doteq 53.8462 = 53.846 \%$

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

#### Following knowledge from mathematics are needed to solve this word math problem:

Looking for help with calculating arithmetic mean? Looking for a statistical calculator? Our percentage calculator will help you quickly calculate various typical tasks with percentages.

## Next similar math problems:

1. Persons
Persons surveyed:100 with result: Volleyball=15% Baseball=9% Sepak Takraw=8% Pingpong=8% Basketball=60% Find the average how many like Basketball and Volleyball. Please show your solution.
2. Art school
Every fifth pupil 9A goes to art school. How many percent of pupils in class 9A go to art school?
3. The ball
The ball was discounted by 10 percent and then again by 30 percent. How many percent of the original price is now?
4. Summerjob
The temporary workers planted new trees. Of the total number of 500 seedlings, they managed to plant 426. How many percents did they meet the daily planting limit?
5. Highway repair
The highway repair was planned for 15 days. However, it was reduced by 30%. How many days did the repair of the highway last?
6. Percentages
52 is what percent of 93?
7. Profit gain
If 5% more is gained by selling an article for Rs. 350 than by selling it for Rs. 340, the cost of the article is:
8. Percents
How many percents is 900 greater than the number 750?
Calculate how many percent will increase the length of an HTML document, if any ASCII character unnecessarily encoded as hexadecimal HTML entity composed of six characters (ampersand, grid #, x, two hex digits and the semicolon). Ie. space as: &#x20;
10. 15 teachers
15 teachers teach for a combined amount of 128 days over a period of 64 days. What is this expressed as a percentage?
11. Savings and retirement
The older sibling has saved 44% more euros than the youngest, which represents 22 euros. How many euros older brother has saved ?
12. Sale off
The TV went down 10% and then 10% off the original price again. Now it costs 300 €. What was its original price?
13. Washing mashine
Family buy a washing machine for 350e. Cash paid 280e. What percentage of the total price must still pay the washer?
14. Perctentages
35% of what number is 35?
15. Apples 14
Maya bought 18 apples. She used 50% of the apples to make apple pies and 1/3 of the apples was mixed with other fruits to make salad. How many apples were left?
16. Enrollment
The enrollment at a local college increased 4% over last year's enrollment of 8548. Find the increase in enrollment (x1) and the current enrollment (x2).
17. Percentage increase
Increase number 400 by 3.5%