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If 4 letter words are formed using lette...

If 4 letter words are formed using letters of the word 'MORADABAD'. Then the probability that D comes exactly once in the 4 letter word is

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NTA MOCK TESTS-NTA JEE MOCK TEST 99-MATHEMATICS
  1. The plane (x)/(1)+(y)/(2)+(z)/(3)=1 intersect x - axis, y - axis at A,...

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  2. Two circles have an external tangent with length 36 cm. The shortest d...

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  3. If 4 letter words are formed using letters of the word 'MORADABAD'. Th...

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  4. The number of values of alpha in [-10pi, 10pi] for which the equations...

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  5. The line joining (5,0) to (10cos theta,10sin theta) is divided interna...

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  6. Let veca=hati-hatj+hatk, vecb=2hati+hatj+hatk and vecc=hati+hatj-2hatk...

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  7. Find the common tangent of y=1+x^(2) and x^(2)+y-1=0. Also find their ...

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  8. For a complex number z, if z^(2)+barz-z=4i and z does not lie in the f...

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  9. The solution of the differential equation (1-x^(2)).(dy)/(dx)+xy=(x-x^...

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  10. If the equation ax^2+2bx-3c=0 has non real roots and < a+b then c is...

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  11. If I=int((lnx)^(5))/(sqrt(x^(2)+x^(2)(lnx)^(3)))dx=ksqrt((lnx)^(3)+1)(...

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  12. The function f(x)=pix^(3)-(3pi)/(2)(a+b)x^(2)+3piabx has a local minim...

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  13. The sum sum(r=1)^50 r.(2^r+2^(50-r)) equals

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  14. The number of five - digit telephone numbers having atleast one of the...

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  15. The limit L=lim(nrarroo)Sigma(r=4)^(n-4)(n)/(n^(2)+r^(2)) satisfies th...

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  16. The sum of the first three terms of an arithmetic progression is 9 and...

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  17. The number of solution of the equation Sigma(r=1)^(5)cos(rx)=0 lying i...

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  18. The marks obtained by 9 students in a chemistry test are 50, 69, 20, 3...

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  19. Let A and B are square matrices of order 3. If |A|=4, |B|=6, B=A-2I an...

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  20. Tangents are drawn from a point P to the hyperbola x^2/2-y^2= 1 If the...

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