The following bar chart shows the numbers of white and black cars sold of 5 different brands in a city during a given year.

X = Average number of black cars sold per brand.

Y = Average number of white cars sold per brand.

What is the value of Y - X?

10

X = Average number of black cars sold per brand.

= \(\frac{96+114+121+109+120 }{5}\) 

= \(\frac{ 560 }{5}\)

= 112

Y = Average number of white cars sold per brand.

= \(\frac{ 108+112+130+160+100 }{5}\) 

= \(\frac{ 610}{5}\)

= 122

Now , Y - X = 122 - 112 = 10