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All posts related to Sets

Anusha
Shared from Sets - 1 on Jun 17, 2015 6:54 PM

Out of 500 people in a locality, the numbers of people who buy items A, B and C are as given below:

Item A only - 90, item A, but not B - 115, items A and C - 40, item A - 130, items B and C - 40, item C - 240, none of the three - 120

What percentage of the total buyers are those who purchase all three items?

 
4%
5%
less than 4%
greater than 5%
Please type your answer before submitting.
Anusha

Is percentage calculated on 380 or total number of people 500?? very confusing..could u please explain

Gourav Kumar
Posted on Mar 18, 2015 3:12 PM

An investigator interviewed 100 students to determine their preference for three drinks: milk (M), coffee (C) and tea (T). He reported the following: 10 students had all the three drinks M, C, T, 20 had M and C only, 30 had C and T, 25 had M and T, 12 had M only, 5 had C only and 8 had T only. Find how many of them did not take any of the three drinks.

 
10
20
25
28
Please type your answer before submitting.
Gourav Kumar

The answer should be 20.... Because 20 had M And C but according to above diagram 30 had M And C ...plaese do reply on this .

Soham
Shared from Sets on Dec 13, 2013 11:44 PM

Out of 200 students in a school, 120 studied Mathematics, 90 studied Physics, 70 studied Chemistry, 40 studied Mathematics and Physics, 30 studied Physics and Chemistry, 50 studied Chemistry and Mathematics, and 20 studied none of these subjects. Find the number of students who studied all the three subjects.

 
10
20
30
None of these
Please type your answer before submitting.
Shambaditya Mukhopadhyay

180=120 90 70-40-30-50 x; => x=20 (A U B U C)=A B C-(A intersctn B)-(B intersctn C)-(A intersctn C) (A intersctn B intersctn C)

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Althaf
Shared from Sets on Nov 10, 2013 10:12 AM

In Foodpur, there are 600 people who eat non-vegetarian food, 400 people who eat vegetarian food and 150 people who eat both. Out of the people who eat non-vegetarian, there are 300 who eat mutton, 400 who eat chicken and 200 who eat both. How many people eat non-vegetarian food, but do not eat mutton or chicken?

 
50
100
150
200
Please type your answer before submitting.
Koman

I to think soo... explanation is wrong

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Nitish Kumar
Shared from Sets on Sep 24, 2013 1:48 AM

 
350
430
540
380
700
Please type your answer before submitting.
Nitish Kumar

Answer will be 460