Statistics

2010013504

Level: 
A
The average price of a pork meat increased by 15% in the year 2018, by 13% in the year 2019 and by 28% in the year 2020. Find the average percentage growth of the price of the pork meat per one year in the period 2017-2020. Round your result to the nearest percent.
18%
19%
20%
17%

2010013503

Level: 
A
Four seamstresses sew doll dresses in a sheltered workshop. During the six-hour working hours, the first seamstress sewed 4 dresses, the second 5, the third 7 and the fourth 4 dresses. What was the average time needed to sew one dress on this day?
1h 12min
1h 20min
1h 10min
1h 24min

2010013502

Level: 
A
The annual production of a business is recorded in the following table. Find the compound annual rate of decline in production for a given period 2017 - 2020. (I.e., the average annual coefficient of the production decline, i.e., the ratio that provides a constant decline rate over the time period.) Round the result to four decimal places. Year2017201820192020Production (pcs)55000500004700045000
0.9353
0.9225
0.9898
0.9535

2010013501

Level: 
A
Two years ago, a family business reported gross profit of 3.5 million euros. During the pandemic, the company got into trouble so that its last year gross profit fell by 20% and its gross profit of this year was 1 million euros lower than of the last year. What was the average annual decrease in the gross profit reported by the company during the priod under review? Round the result to the tenth of a percent.
28.3%
27.9%
26.7%
28.2%