The following graph shows the data of the production of electric wire (in thousand tons b three different companies P, and R over the years.

What is the ratio of the average production of Company Pin the period 2017- 2019 to the average production of Company Q in the same period?

23 : 25

Average production of P in 2017 - 2019  :   Average production of Q in 2017 - 2019

\(\frac{25+50+40 }{3}\)  :  \(\frac{35+40+50 }{3}\)

 \(\frac{115 }{3}\)  :  \(\frac{125 }{3}\)

              23            :         25