A beedi making workshop can hire 5 women by paying them Rs. 300 per day. The 6th woman demands Rs. 350 per day. If this woman is hired then all other women must be paid Rs. 350. The marginal resource (labour) cost of the 6th woman is
In the following square represents Doctors, triangle represents Artists, circle represents Weight-lifters and rectangle represents Russians. Which set of letters represents Russians who are not Doctors?