In february, alec had 1,571 visitors to his website. in march, he had 1,380 visitors to his website. what is the percentage decrease of the number of visitors to alec's website from february to march? if necessary, round to the nearest tenth of a percent. a. 12.2% b. 13.9% c. 13.8% d. 87.8%

The answer is A. 12.2%

you times 1380 by 100 which equals 138,000

now divide 138,000 by 1571 the you get ≈ 87.8%

87.8% is the percent of 1380, so you have to subtract 100 by 87.8 and you get 12.2%.

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.