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If for a random variable x, the variance...

If for a random variable x, the variance of x is 1.84 and the expectation of x is 3.6, then the expectation of `x^2` is

A

14.8

B

11.12

C

5.44

D

6.98

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UNITED BOOK HOUSE-SET 17-EXERCISE
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  2. Three events A,B and C are mutually exclusive and exhaustive , if P(A)...

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  3. If for a random variable x, the variance of x is 1.84 and the expectat...

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  4. Find the value of sin cot^-1 cos (tan^-1(2))

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  5. A binary operation * is defined on the set of real numbers R by a*b =...

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  6. Solve for a,b,c and d when ((b+c, c+a), (7 - d ,6 -c)) = ((9-d, 8-d),(...

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  7. Evaluate : |[0, (a-b)^3, (b-c)^3], [(b-a)^3, 0, (c-a)^3],[(c- b)^3, (a...

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  8. Examine whether the following function is continuous at x = 0 . phi(...

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  9. Find the differential co-efficient of logx10 with respect to tan^-1x.

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  10. Evaluate: int((cosx+xsinx)/(x(x+cosx)))dx.

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  11. Find if Lagrange's Mean Value Theorem is applicable to the function f...

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  12. Eleminating a and b, find the differential equation of all ellipse of ...

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  13. Evaluate : underset(x rarr 0) Lt (1+3x)^((x+2)/x)

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  14. If vec a, vec b, vec c are unit vectors satisfying the condition veca+...

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  15. Find the value of lambda so that the plane vecr. (veci + 2vecj + 3veck...

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  16. If P(A)=1/4,P(B)=1/3 and P(A-B)=1/6 then verify whether a and B are tw...

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  17. An unbiased coin is tossed 6 times. Find the probability of at least f...

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  18. Given A =[(1,-1,1),(1,-2,-2),(2,1,3)] & B = [(-4,4,4),(-7,1,3),(5 , -3...

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  19. Show that: |[a, b-c,c+b], [a+c, b, c-a],[a-b,b+a, c]|=(a+b+c)(a^2+b^2...

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  20. Show that int(2x+3)/(x^2 - 3x + 2) dx

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