Explain, dont just give answers cuz i wanna know how to do it in the future? do i need to use a proportion?

3 pedal turns = 7 rears

3rear = 14

rear = 14/3 or 4 2/3 turns.

4 2/3

Step-by-step explanation:

Yes, you can use a proportion.

3 turns of pedal is to 7 turns of wheel as 2 turns of pedals is to x turns of wheels.

3/7 = 2/x

Cross multiply:

3x = 2 * 7

3x = 14

x = 14/3

x = 4 2/3

4 2/3 turns of the wheel.

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.