Estimate the product 2 2/7 x 8 11/13 ? a) 27 b) 18 c) 16 d) 24

2 2/7 is close to 2.

8 11/13 is close to 9.

2 * 9 = 18, so my estimate is that 2 2/7 * 8 11/13 is approximately 18

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.