In a hostel 50% of the girls like tea, 40% like coffee and 20% like both tea and coffee
A girl is selected at random.
Find the probability that she likes neither tea or coffee .

In a hostel 50% of the girls like tea, 40% like coffee and 20% like both tea and coffee.A girl is selected at random.If the girl likes tea,then find the probability that she likes coffee.

In a hostel 50% of the girls like tea, 40% like coffee and 20% like both tea and coffee .A girl is selected at random.If she likes coffee then find the probability she likes tea.

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.

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

Suppose in a group of 100 persons 80 take tea, 30 take coffee and 20 take both tea and coffee. Suppose T denotes the set of all persons in the group taking tea and C denotes the set of all persons in the group taking coffee. Fill in the blanks n(T) = -----, n(C) = -----, n(T cap C) = -----

In an examination.30% of students failed in Maths,20% of students failed in Chemistry and 10% of students failed in both Maths & Chemistry.A student is selected at random.Find the probability that (i) The student has failed in Maths.

In an examination.30% of students failed in Maths,20% of students failed in Chemistry and 10% of students failed in both Maths & Chemistry.A student is selected at random.Find the probability that (ii) The student has failed in Chemistry

In an examination.30% of students failed in Maths,20% of students failed in Chemistry and 10% of students failed in both Maths & Chemistry.A student is selected at random.Find the probability that the student has failed in Maths,it is known that he has failed in Chemistry.

In class XI of a school 40% of the students study Mathematics and 30% study Biology, 10% of the class study both Mathematics and Biology. If a student is selected at random from the class, find the probability that he will be studying mathematics or Biology.