Deepinder lent Rs 8200 to Jairaj for 16 years and Rs 4900 to Karna for 15 years on simple interest at the same rate of interest and received Rs 19446.5 in all from both of them as interest. The rate of interest per annum is:
In the following figure, square represents Pharmasists, triangle represents Singers, circle represents Surgeons and rectangle represents Mothers. Which set of letters represents Surgeons who are either mothers or singers?