In the following figure, rectangle represents Technicians, circle represents Bakers, triangle represents Playwrights and square represents Gymnasts. Which set of letters represents Technicians who are Bakers?
A 600 metres long train is running at the speed of 81 km/hr. If it crosses a platform in 40 seconds, then what is the length of the platform (in metres)?
The mean score in a test of the 10 boys in a class was 15 while the overall mean of the 25 students in the class was 16.2. What was the mean score of the girls?