The average revenues of 7 consecutive years of a company is Rs 83 lakhs. If the average of first 4 years is Rs 78 lakhs and that of last 4 years is Rs 90 lakhs, find the revenue for the 4th year.
In the following figure, rectangle represents Chefs, circle represents Racers, triangle represents Jugglers and square represents Golfers. Which set of letters represents Racers who are not Jugglers?