गुदगुदी करना | Hindi to English #shorts

In a class, 300 students speak Hindi, 150 students speak English and 100 students speak both Hindi and English. Then, total number of students is

Find the number of ways of selecting 4 English, 3 Telugu and 2 Hindi books out of 7 English, 6 Telugu and 5 Hindi books.

The probability that a student selected at random from a class will pass in Hindi is 4/5 and the probability that he passes in Hindi and English is 1/2 . What is the probability that he will pass in English if it is known that he has passed in Hindi ?

In a hostel 60% of the students read Hindi news paper, 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 news paper ?

In a group of students,100 students know Hindi,50 know English and 25 know both. Each of the students knows either Hindi or English.How many students are there in the group?