OR A tank originally contains 100 gallon of fresh water. Then water
containing 0 5 Lb of salt per gallon is pourd into the tank at a rate of 2
gal/minute, and the mixture is allowed to leave at the same rate. After 10
minute the process is stopped, and fresh water is poured into the tank at a
rate of 2 gal/min, with the mixture again leaving at the same rate. Find the
amount of salt in the tank at end of an additional 10 minutes.​

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 11.2 (i know i’m late)