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In a class of 55 students, the number of...

In a class of 55 students, the number of students studying different subjects are 23 in mathematics , 24 in physics, 19 in chemistry , 12 in mathematics and physics, 9 in mathematics and chemistry , 7 in physics and chemistry and 4 in all the three subjects .
The number of students who have taken exactly one subject is

A

6

B

9

C

7

D

all of these

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The correct Answer is:
D
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DIPTI PUBLICATION ( AP EAMET)-SETS ( APPENDIX - 1)-EXERCISE
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  2. A = {(x,y) : y = 1//x,0 ne x in R} , B = {(x, y) : y = - x, x in R} th...

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  3. A = {x : cos x gt - 1//2, 0 le x le pi}, B = {x : sin x gt 1//2,pi//3 ...

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  4. If aN = {ax : x in N} " then " 3N cap 7N =

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  5. If aN = {ax : x in N} " and " bN cap cN = dN " where " b,c in N are ...

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  6. Which of the following is an empty set

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  7. The smallest A such that A cup {1,2} = {1,2,3,5,9} is

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

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  9. Consider the set A of all determinants of order 3 with entries 0 or 1 ...

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  12. Two finite sets have m and n elements. The total number of subsets of ...

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

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  15. In a class of 100 students, 55 students have passed in Mathematics and...

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  16. Out of 800 boys in a school , 224 played cricket, 240 played hookey a...

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  18. In a certain town 25% families own a phone and 15% own a car, 65% fami...

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