Out of 200 students from a school. 135 like kabaddi and the remaining students do not like the game. If one student is selected at random from all the students, find the probability that the student selected doesn't like kabaddi.

Out of 200 studenst from a school,135 like kabbaddi and the remaining students do not like the game.If one student is selected at random from all the students,find the probability that the student selected doesn't like kabbaddi.

Out of 80 students in a class , 30 passed in Mathematics, 20 in Electronics and10 in both. If one students is selected at random. The probability that the student has passed in none of the subject is

In four schools B_1, B_2, B_3, B_4 the percentage of girls students is 12, 20, 13, 17 respectively. From a school selected at random, one student is picked up at random and it is found that the student is a girl. The probability that the school selected is B_2 , is

In a class, 60% of the students know lesson I , 40% know lesson II and 20% know lesson I and II. A student is selected at random . The probability that the student does not know lesson I and lesson II is .

Five students are selected from 11. How many ways can these students be selected if. a) two specified students are selected? b) two specified students are not selected?