8. Look at how you used the 1s, 2s, and 5s facts in 7. What generalizations can you make? Test your generalizations with another fact.
Facts with can be broken down into 5s facts and 1s facts. Facts with can be broken down
into two 2s facts.
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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.

the answer is 99.