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Let A be the set of 4-digit numbers a1 a...

Let A be the set of 4-digit numbers `a_1 a_2 a_3 a_4` where `a_1 > a_2 > a_3 > a_4`, then `n(A)` is equal to

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RESONANCE DPP-JEE MAINS-All Questions
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  2. If the sum of n terms of an A.P. is 3n^2+5 and its m^(t h) term is ...

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  3. Let A be the set of 4-digit numbers a1 a2 a3 a4 where a1 > a2 > a3 > a...

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  4. The sum of the rational terms in the expansion of (sqrt(2)+ root(5...

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  5. If the sum of the coefficients in the expansion of (2x+3cx+c^(2)x^(2))...

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  6. If lim(n->oo)(n*3^n)/(n(x-2)^n +n*3^(n+1)-3^n) = 1/3 then the range of...

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  7. If [.] and {.} denote greatest and fractional part functions respectiv...

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  8. Locus of the mid points of the chords of the circle x^2+y^2=a^2 which ...

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  9. A student read common difference of an A.P. as -2 instead of 2 and g...

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  10. If the slope of the curve y=(ax)/(b-x) at the point (1, 1) is 2, then

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  11. The area of the figure bounded by right of the line y = x + 1, y= cos ...

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  12. If (-2a,a+1) lies in the interior (smaller region) bounded by the circ...

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  13. How many different words can be formed with the letters of the word...

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  14. Let N be the set of all natural numbers and let R be relation i...

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  15. Let mean of 100 data points be 55 and variance be 16. Now if every d...

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  16. All the 7 digit numbers containing each of the digits 1,2,3,4, 5, 6,7 ...

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  17. If alpha,beta,gamma,delta are four complex numbers such that gamma/del...

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  18. ^7C7+^8C7+^9C7+^(10)C7+^(20)C7= ^21 C8 2. ^21 C(13) 3. Neither 1...

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  19. The value of int5^(10)(sqrt(x+sqrt(20 x-100))+sqrt(x-sqrt(20 x-100)))...

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  20. Let A = {1,2,3,4,...,n} be a set containing n elements, then for any g...

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