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The A.M of two numbers is 10,if one numb...

The A.M of two numbers is 10,if one number is 7,then the other number will be __

A

a)15

B

b)14

C

c)13

D

d)11

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UNITED BOOK HOUSE-TECHNO INDIA GROUP ACADEMIA,SOUTH KOLKATA.-EXERCISE
  1. State which of the following statements is true:

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  2. The A.M of two numbers is 10,if one number is 7,then the other number ...

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  3. The vlaue of lim(xrarr16)(x^(1//4)-16^(1//4))/(x-16)is

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  4. Find the median of the following numbers :8,15,53,49,19,62,7,15,95,77

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  5. For two mutually exclusive events A and B,P(A)=1/2and P(AcupB)=2/3,the...

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  6. If sintheta+sinphi=2,then what is the value of cos(theta+phi)?

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  7. The roots of the equation 3x^2-5x+p=0 are equal state which of the fol...

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  8. Determine x so that 2 is the slope of the line passing through P(2, 5)...

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  9. Equation of the circle concentric to the circle x^2+y^2+4x-2y=20and th...

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  10. Find the middle term of the expansion (1-1/x)^8.

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  11. Find the power set of A={a,b,c}.

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  12. A relation R is defind on the set A={2,3,4,5} as follows :(x,y)in Rimp...

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  13. In /\ABC,a=2,b=3 and sin A=2/3.Find |B

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  14. Prove that ,(sin2x)/(1+cos2x)=tanx

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  15. Express in the form A+iB,(A,B are real),i/(1+i)+(1+i)/i

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  16. If (2n)C3:nC3=11:1find n.

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  17. The n term of an A.P is 7n-5,find the sum of first 20 terms of the se...

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  18. Find the 4the term from the end in the expansion of (x^3/2-2/x^2)^9

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  19. Find the equation of the perpendicular bisect or of the line joining t...

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  20. Find the ratio in which the line segment joining A(2,4,5) and B(3,5,4)...

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