In an orchestra the ratio of trombones to violas is 1 to 3.
a. there are 9 violas. write a proportion that gives the number t of trombones in the orchestra.
b. how many trombones are in the orchestra? , i'm in 8th grade! (: youu..

Givens

So, if there are 9 violas, the number of trombones is three, because 9 violas represents a triple proportion, which means we need to multiply by 3 to find the number of trombones according to the given proportion.

The expression that gives the number of trombones is

The number of trombones is 3, there are 3 trombones while there are 9 violas.

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.