Find the measure of ∠d if ∠a = 5 2 x + 30 ∠b = 7 2 x + 40 ∠c = 9 2 x + 10 ∠d = 5 2 x + 20

For anyone who needs the measure itself, it's 70.

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.

ddd

step-by-step explanation: