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If the mean of the frequency distributio...

If the mean of the frequency distribution

is 28, then its variance is _______

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JEE MAINS PREVIOUS YEAR-JEE MAIN 2023-Question
  1. Let a, b, c be three distinct positive real numbers such that (2a)^(lo...

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  2. Let a common tangent to the curves y^2=4x and (x-4)^2 +y^2 =16 touch t...

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  3. If the mean of the frequency distribution is 28, then its varianc...

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  4. The coefficient of x^7 in (1-x+2x^3)^10 is

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  5. The distance of the point (-1,2,3) from the plane vecr*(hati-2hatj+hat...

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  6. max(0lexlepi){x-2sinxcosx+1/3sin3x} =

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  7. Among (S1) : lim(n to oo)1/(n^2)(2+4+6+.......+2n)=1 (S2) : lim (n...

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  8. Let B=[[1,3,a],[1,2,3],[a,a,4]] , a gt 2 be the adjoint of a matrix A ...

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  9. Let veca=hati+4hatj+2hatk,vecb=3hati-2hatj+7hatk and vecc =2hati-hatj+...

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  10. The set of all a in RR for which the equation x|x-1|+|x+2|+a=0 has exa...

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  11. A coin is biased so that head is 3 times as likely to occur as tail. t...

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  12. Let PQ be a focal chord of the parabola y^2=36x of lenght 100, making ...

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  13. The area of the region enclosed by the curve f(x)=max{sinx,cosx},-pile...

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  14. The number of symmetric matrices of order 3, with all the entries from...

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  15. Fractional part of the number (4^(2022))/(15) is equal to

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  16. Let s1,s2,s3,......,s(10) and the common differences are 1,3,5,.....,1...

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  17. For the system of liner equation 2x+4y+2az=b x+2y+3z=4 2x-5y+2z=8...

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  18. For xinRR ,two real valued functons f(x) and g(x) are such that ,g(x)=...

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  19. For the differentiable function f:RR-{0} rarr RR, "let" 3f(x)+2f(1/x)=...

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  20. Let y=y1(x) and y=y2(x) be the solution curves of the differential equ...

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