The ratio of money in brian's wallet to colin's wallet one day was 7: 2. brian spent ? 39 that day. brian now had ? 4 less than colin. how much did colin initially have?

$17.2

Step-by-step explanation:

The ratio of money in Brian's wallet to Colin's wallet is;

.....(1)

If Brian spent $39, then he now

has: $(B-39)

This amount compared to Collin's money is

$(B-39)=C+4

B=C+4+39

B=C+43.....(2)

Put equation (1) in (2)

Collins initially had $17.2

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.

answer: i believe it’s 245.04

step-by-step explanation: