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There are 50 students admitted to a nursery class. Some students can speak only English and some can speak only Hindi. Ten students can speak both English and Hindi. If the number of students who can speak English is 21, then how many students can speak Hindi, how many can speak only Hindi and how many can speak only English? (a) 21, 11 and 29 respectively (b) 28, 18 and 22 respectively (c) 37, 27 and 13 respectively (d) 39, 29 and 11 respectively

In a class of 50 students, 23 speak English, 15 speak Hindi and 18 speak Punjabi. 3 speak only English and Hindi, 6 speak only Hindi and Punjabi and 6 speak only English and Punjabi. If 9 speak only English, then how many speak all the three? (a) 1 (b) 2 (c) 3 (d) 5

There are 48 students in a class with the age of one of the students being twice that of the age of another. If these two students are replaced by two others whose ages are 16 years and 11 years respectively, the average age of the class increases by 1.5 month. Find the age of the younger of the two students.

Study the following information carefully and answer the questions given below. There are five vehicles of different types viz., Bus, Van, Bike, Truck and Jeep in a garage but not necessarily in the same order. They are serviced at different timing in a single day. The duration of their servicing in the garage may or may not be different. The total duration of the servicing in the garage by the mechanic is of 11 hours. There is no gap between the servicing time of all vehicles. The duration of servicing is either a full hour or half an hour but not in one third or one fourth. The van was serviced in the garage from 12:30 pm to 3 pm. Jeep was taken for servicing immediately after the Van. The servicing hour of Jeep in the garage is three hours. The duration of servicing of Truck is more than the duration of servicing of Bike in the garage by 1 hour. Truck was serviced just after the servicing of Bike. The truck was not serviced at the last. The bus was serviced in the garage before Van but not immediately before. The duration of servicing of the bus is of 1.5 hours. The servicing of the bike is after 6:00 am. Which among the following was serviced from 3:00-6:00 pm?