A group consists of a number of students and each students and each student of the group can speak at least one of the languages Bengali, Hindi and English. 65 can speak Bengali, 54 Hindi and 37 English, 31 can speak both Bengali and Hindi, 17 both Hindi and English, and 18 both Bengali and English. Determine the greatest and least number of students in the group.

It is known that in a group of people, each of which speaks at least one of the languages English, Hindi and Bengali, 31 speak English, 36 speak Hindi and 27 speak Bengali. 10 speak both English and Hindi, 9 both English and Bengali and 11 both Hindi and Bengali. Using a Venn diagram or otherwise, prove that the group contains at least 64 people and not more than 73 people.

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

In a group of 800 people,550 can speak Hindi and 450 can speak English.How many can speak both Hindi and English?

In a group of 760 persons , 510 can speak Hindi and 360 can speak English .Find : how many can speak both Hindi and English

In a group of 800 people, 550 can speak Hindi and 450 can speak English. How many. can 'speak both Hindi and English?

In a group of 400 people , 350 can speak Hindi and 300 can speck English . How many people can speak both Hindi and English ?