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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

In a state with a population of 75 x 10^6, 45% of them know Hindi, 22% know English, 18% know Sanskrit, 12% know. Hindi and English, 8% know English and Sanskrit, 10% know Hindi and Sanskrit and 5% known all the three languages What is the number of people who do not know any of the above three languages? What is the number of people who know only Hindi . What is the number of people who know only Sanskrit? What is the number of people who know only English? What is the number of people who know only one language? What is the number of people who know only two languages?

Out of 100 students who appeared for the SSC examination from a school 15 students in English ; 12 students in Mathematics; 8 students in Sience 7 studens in Mathematics and Science; 4 students in English and Science 6 students in English and Mathematics; 4 students in all the three subjects could get First calss marks. How many of them have got First class marks.(ii) only in Science (i) only in Mathmatics