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The number of ways in which a committee ...

The number of ways in which a committee of 3 women and 4 men be chosen from 8 women and 7 men. If Mr. X refuses to serve on thcommittee of Mr. Y is a member of the committee is

A

420

B

840

C

1540

D

1400

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The correct Answer is:
D
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FIITJEE-MATHEMATICS TIPS-ASSIGNMENT -OBJECTIVE
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  4. Forty team play a tournament. Each team plays every other team just ...

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  5. The largest, two digit prime factor of ""^(200)C(100) is

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  6. The number of ordered pairs of positive integers (m, n) satisfying m l...

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  7. The minimum value of (x^4+y^4+z^2)/(x y z) for positive real numbers x...

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  8. z is a complex number such that z+1/z=2cos 3^0 ,then the value of z^(2...

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  9. Let the unit vectors vec a, vec b, vec c be the position vectors of t...

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  10. If A=[{:(1,1),(0,1):}] and B=[{:(sqrt(3)//2,1//2),(-1//2,sqrt(3)//2):}...

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  11. The quadratic x^2+a x=b+1=0 has roots which are positive integers, the...

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  12. If the planes x=cy+bz,y=az+cx and z=bx+ay pass through a line then a^(...

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  13. The distance of point of intersection of lines (x-4)/1=(x+3)/-4=(z-1)...

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  14. Let A, B, C be points with position vectors r(1)=2hati-hatj+hatk, r(2)...

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  15. The real numbers x, y satisfy x^(3)-3x^(2)+5x-17=0 and y^(3)-3y^(2)+5y...

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  16. x, y, z in R such that x^(2)+y^(2)+z^(2)=1 and alpha=x^(2)+2y^(2)+3z^(...

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  17. Let A, B, C be three events such that P (exactly one of A or (B) = P (...

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  18. If px^(4)+qx^(3)+rx^(2)+sx+t=|{:(x^(2)+3x,x-1,x+3),(x^(2)+1,2-x,x-3),(...

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  19. In a 4xx4 matrix the sum of each row, column and both the main diagona...

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  20. A unit tengent vector at t = 2 on the curve x=t^(2)+2, y=4t^(3)-5,z=2t...

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