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In a group of students, 100 students kno...

In a group of students, 100 students know Hindi, 50 know English and 25 know both. Each of the students knows either Hindi or English. How many students are there in the group?

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JBD PUBLICATION-MODEL PAPER (5)-EXERICSE
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  4. If A={3,5},B={2,4,6}. Find n(AxxB)

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  5. If A={3,5},B={2,4,6}. Find n(BxxA)

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  7. Using principle of mathematical induction, prove that: 1+3+5+………..+(2n...

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  9. Find the value of r if 5. ^4Pr= 6. "^5P(r-1).

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  10. If the sum of n terms of an A.P is nP+1/2 n(n-1)Q, where P and Q are c...

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  11. If the pth, qth and rth terms of an A.P. be x,y,z repsectively, then s...

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  12. Find a point on the x-axis which is equidistant from the points (7, 6)...

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  13. Find the equation of ellipse that satisfy the given conditions: Length...

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  14. Find the derivative of 1/x^2

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  15. Find underset(xrarr0)lim f(x), where f(x)={(|x|/x, xne0),(0, x=0):}

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  17. One card is drawn from a well shuffled deck of 52 cards. If each outco...

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  18. One card is drawn from a well shuffled deck of 52 cards. If each outco...

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  19. If z=x+iy and |z|=1, show that the complex number z1=(z-1)/(z+1) is pu...

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  20. Solve the following system of inequalities graphically: 3x + 2y le 12,...

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