In a class of 125 students 70 passed in Mathematics, 55 in statistics, and 30 in both. Then find the probability that a student selected at random from the class has passes in only one subject.

100 students appeared for two examinations.60 passed the first,0 passed the second and 30 passed both.Find the probability that a student selected at random has passed at least one examination.

If there are 50 students in a class out of which 35 are boys.if only 60% of students passes in an exmination then find the probability that a student selected at random will be a girl who has passed the exam.

In an examination, there are 500 students, 150 passed the first paper and 350 passed the second paper. 50 students passed both the papers. Find the probability that a student selected at random has failed in both the papers.

100 students appeared for two tests, 60 passed the first, 50 passed the second and 30 passed both. Probability that a student selected at random has failed in both tests is

In a class of 60 students, 30 passed in Physics ,24 passed in Biology and 24 passed in both. Find the number of students who could have failed in both the subjects

In an examination 30% of the students failed in Physics, 25% in Mathematics and 12% in both Physics and Mathematics. A student is selected at random. Find the probability that the student has failed in Physics, if it is known that he has failed in Mathematics. (ii) the student has failed at least one of the two subjects (ii) the student has passed at least one of the two subjects (iv) the student has passed in Mathematics if he failed in Physics.

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 or both.

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.