I will give you the brainliest if you get this correct If you solve this you get 100 points.
There are 10 red and blue marbles, among which r are red. How many are blue? Denote blue marbles as b.

r + b = 10

Step-by-step explanation:

r + b = 10

Since we don't know how many of either red or blue there is you just use the variables to make an equation.

Since there are 10 marbles in two different colors red and blue we can add red and blue to equal the total.

r + b = 10

Step-by-step explanation:

Let red be r and blue be b obviously, there is know way to solve this other than to guess because there can be many values for this

My guesses:

There is 1 blue marble: (Remeber the equation above) so 9+ 1 = 10 marbles

There is 2 blue marbles: 8 + 2 = 10

There is 3 blue marbles so 7 + 3 = 10

There is 4 blue marbles so 6 + 4 = 10

There is 5 blue marbles so 5 + 5 = 10

There is 6 blue marbles so 4 + 6 = 10

There is 7 blue marbles, I think you see the connection

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.

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.