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In a group of 50 persons, 40 speak Hindi and 25 speak English and Hindi both. Find how many persons speak only English ? Also find how many persons speak English ?

Rita scored 20 marks more in Maths than the marks scored in English. Give an expression for: a. her marks in English if her marks in Maths are x. b. her marks in Maths if her marks in English are y.

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 950 persons, 750 can speak Hindi and 460 can speak English. Find: How many can speak both Hindi and English. How many can speak English only. How many can speak Hindi only

The marks obtained by 10 candidates in English and Mathematics are given below: Estimate the probable score for Mathematics if the marks obtained in English are 24.