The table given below shows the sales of bikes and cars of five companies.

J1 = The average sale of bikes of company P, Q and R.

J2 = The average sale of cars of company R, S and T.

What is the value of (J1: J2)?

8 : 25

J1 = The average sale of bikes of company P, Q and R

= \(\frac{ 200 +  100 + 500}{3}\) = \(\frac{ 800}{3}\) 

J2 = The average sale of cars of company R, S and T

= \(\frac{ 700 +  1000 + 800}{3}\)  = \(\frac{ 2500}{3}\) 

Ratio of J1 : J2

= \(\frac{ 800}{3}\)  : \(\frac{ 2500}{3}\) 

= 8 : 25