Out of 100 students,two sections of 40 and 60 are formed.If you and your friend are among the 100 students,what is the probability that You both enter the same section?

Out of 100 students,two sections of 40 and 60 are formed.If you and your friend are among the 100 students,what is the probability that : You both enter the different section?

Of the students in a college, it is known that 60 % reside in hostel and 40 % are day scholars (not residing in hostel). Previous year results report that 30 % of all students who reside in hostel atțain A grade and 20 % of day scholars attain A grade in their annual examination. At the end of the year, one stüdent is chosen at random from the college and he has an A grade, what is the probability that the student is a hostlier?

In a class, 40% of students study Maths and Science and 60% study Maths. What is the probability of a student studying Science given the student is already studying Maths?

In an entrance test that is graded on the basis of two examinations, the probability of a randomly chosen student passing the first examination is 0.8 and the probability of passing the second examination is 0.7. The probability of passing at least one of them is 0.95. What is the probability of passing both?

In an entrance test that is graded on the basis of two examinations, the probability of a randomiy chosen student passing the first examination is 0.8 and the probability of passing the second examination is 0.7 . The probability of passing atleast one of them is 0.95 . What is the probability of passing both?

There are 30 scouts and 20 guides in a school In another school, there are 20 scouts and 15 guides From each school, one student among them is to be selected for participation in a seminar a) What is the total number of possible selections? b) What is the probability of both being Scouts? c) What is the probability of both being guides? d) What is the probability of one scout and one guide?

In the lab students were asked to carry out the reaction between phenol and cons. HNO_3 . But one student,'A' carried out the reaction between phenol and dil. HNO_3 . Do you think that the student 'A' got the same result as others. Substantiate with suitable explanations. [Also write the chemical equations wherever necessary].

In a ladies hostel,60% of the students read Hindi newspaper,40% read English newspaper and 20%read both Hindi and English newspapers.A student is selected at random. Find the probability that she reads neither Hindi nor English newspapers.