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?
Answer & explanation
Correct answer: option 2
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