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Each student in a class of 40, studies a...

Each student in a class of 40, studies at least one of the subjects English, Mathematics and Economics.16 study English, 22 Economics and 26 Mathematics, 5 study English and Economic, 14 Mathematics and Economics and 2 study all the three subjects. The number of students who study English and Mathematics but not Economics is

A

7

B

5

C

10

D

4

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The correct Answer is:
B
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DISHA PUBLICATION-SETS-EXERCISE-1 : CONCEPT BUILDER
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  2. If A and B are two sets prove that Ann(B-A)=phi

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  3. Each student in a class of 40, studies at least one of the subjects En...

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  4. If A and B are two sets, then (AuuB)'uu(A'nnb) is equal to

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  5. If A={1,2,5} and B={3,4,5,9}, then ADeltaB is equal to

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  6. Let X = {Rani, Geeta, Akbar} be the set of students of Class XI who a...

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  7. Let A={3,6,9,12,15,18,21} B={4,8,12,16,20} C={2,4,6,8,10,12,14,16}...

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  8. Out of 800 boys in a school, 224 played cricket, 240 played hockey and...

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  9. Let A={(n,2n):ninN} and B={(2n,3n):ninN}. What is AnnB equal to ?

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  10. If A is the set of all divisors of the number 15. B is the set of prim...

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  11. let mu= the set of all triangles, P = the set of all isosceles triangl...

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  12. If U = {1,2,3,4,5,6,7,8,9,10}, A = {1,2,3,5}, B = 2,4,6,7} and C = {2,...

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  13. if a N={a x:x iin N} and b N cap c N , where b,c in Nare relative...

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  14. Let n(U)=700, n(A)=200,n(B)=300 and n(AnnB)=100, then find n(A'nnB')

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  15. A market research group conducted a survey of 2000 consumers and re...

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  16. In a college of 300 students, every student reads 5 newspapers and eve...

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  17. In a class of 55 students, the number of students studying different s...

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  18. In a battle, 70% of the combatants lost one eye, 80% an are, 75% an ar...

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  19. In a city 20 percent of the population travels by car, 50 percent trav...

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  20. In a town of 10,000 families it was found that 40% family buy newspape...

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