This histogram shows the number of shoppers in various age groups at a clothing store. How many shoppers are at least 30 years old?

5 shoppers

7 shoppers

13 shoppers

17 shoppers

Histogram titled Ages of Shoppers. Histogram with vertical axis labeled Number of Shoppers and ranges from 0 to 10. The horizontal axis labeled Age and has 4 categories, one for each of the four bars. Bar 1 labeled 10 to 19 has a height of 6. Bar 2 labeled 20 to 29 has a height of 7. Bar 3 labeled 30 to 39 has a height of 4. Bar 4 labeled 40 to 49 has a height of 1.

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.

3x + 4y -25 =0 represents the amount of change sianna should recieve