Question:- In a certain collage, 4% of boys and 1% of girls are taller than 1.75 metres, Furthermore, 60% of the students in the college are girls. A student is selected at random from the college and is found to be taller than 1.75 metres. Find the probability that the selected student is a girl.
Solution: Let E = Student selected is girl
F = Student selected is boy
A = Student selected is taller than 1.75 metres
Now,
probability that A student is selected at random from the college and is found to be taller than 1.75 metres and the the selected student is a girl
Question 1:- An urn contains 5 red and 2 black balls. Two balls are randomly drawn, without replacement. Let X represent the number of black balls drawn. What are the possible values of X ? Is X is random variable ? If yes, find the mean of X.
Solution:- See full solution
Some other question
1 .Show that of all the rectangles inscribed in a given fixed circle
2. int root cotx + root tanx dx