There are two couches against a wall. if one takes up 4/9 of the wall and the other takes up 1/5 of the wall, how much of the wall is covered by couches?

we know that

One of the couches takes up of the wall and the other takes up   of the wall

so

To find out how much of the wall is covered by couches, add the two amounts

therefore

the answer is

of the wall is covered by couches

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.

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step-by-step explanation: