What is the value of the expression shown below?
8.63 + 1.4 - (2.2)
A. 12.23
B. 12.06
C. 8.99
D. 7.83

(D) 7.83

Lets solve the equation.

8.63+1.4-(2.2)

First add: 8.63+1.4=10.03

Then subtract: 10.03-(2.2)=7.83

So, the answer is 7.83

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.

4.08%

step-by-step explanation: