MBA Exam

in a community, 80 persons belong to group A, 70 persons belong to group B and 60 persons belong to group C. Further, 40 persons belong to both group A and group B, 50 persons belong to both group B and group C and 30 persons belong to both group A and group C. Assume that the total number of persons belonging to exactly one of the groups is N, How many diff values of N are possible?plzzzz post the soln

1) 7
2) 11
3) 17
4) 31

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MBA Other Question
What is the maximum value of

1) 9/5
2) √3
3) 2
4) 1.5
 The price of a commodity in the country X is Rs.500 and that in the country Y is Rs.1000. If there is a 10% increase in price in the country X every year and price in the country Y remains constant, then find the least number of whole years in which the price of the commodity in the country X will be more than , or equal to that in the country Y ?

1) 2
2) 4
3) 6
4) 8