Solve the equation 2(5z+15)

This question is simple. Just follow the following steps:

1. Multiply 2 by 5z because you have to remove the parenthesis

2x5z=10z

2. Then multiply 2 by 15

15x2= 30

Then add 10z to 30.

30+10z is your answer.

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.