Arecent study indicates that the annual cost of maintaining and repairing a car in a town in ontario averages 200 with a variance of 260. a tax of 20% is introduced on all items associated with the maintenance and repair of cars (i. e., everything is made 20% more expensive). calculate the variance of the annual cost of maintaining and repairing a car after the tax is introduced.

374.4

Step-by-step explanation:

All items related to the maintenance are 20% more expensive, it means that each datum is 20% bigger including the average.

The variance its a dispersion measurof the data and its calculated of this way:

Here n is the number of data, is the average and represent each datum. The increment in 20% in each parameter can be represented multiplying for 1.2, of this way

Factorizing the 1.2 we have:

That is:

The new variance is

how is that middle school

step-by-step explanation:

-4

step-by-step explanation: