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If n(X) = 4 and n(Y) = 7, then find the...

If n(X) = 4 and n(Y) = 7, then find the maximum and minimum value of `n(XcupY)`.

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 15-EXERCISE
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  2. If the coefficent of variation = 40% and variance = 16, the mean will ...

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  5. Find the value of tan 20^@ tan 40^@ tan 80^@.

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  6. In /\PQR, angleP = 60^@, show that q + r = (q-p)/2

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  8. If ^25Cr=^25C(2r+1),the value of ^rC5is

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  9. If (1+x)^n=C0+C1x+C2x^2+…..+Cnx^n.then show that C1+2C2+….nCn=n.2^(n-1...

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  10. Calculate the sum of the series : 3-3/2+3/2^2-3/2^3+….

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  11. Find the length of the intercept of the staight line 3x +4y = 12 with ...

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  12. Find the image of the co-ordinate of a point.(-3, 4, 7) with respect t...

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  19. If a^4+b^4+c^4+a^2b^2=2c^2(a^2+b^2),, then show thatangleC=60^@or120^@

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  20. By ........in "Principle of Mathematical Induction" prove that for all...

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