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If ui = (xi-25)/10 , sumfiui = 30 and su...

If `u_i = (x_i-25)/10 , sumf_iu_i = 30` and `sumf_i = 50`, find `barx`.

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UNITED BOOK HOUSE-BARANAGAR RAMAKRISHAN MISSION HIGH SCHOOL-EXERCISE
  1. If the total surface area of a cube is 216 sq.meter, then find its vol...

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  2. Three angles of a triangle are alpha-beta,alpha,alpha+beta. If the gre...

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  3. If ui = (xi-25)/10 , sumfiui = 30 and sumfi = 50, find barx.

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  4. If the rate of compound interet for the 1st and 2nd year are 4% and 5%...

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  5. At the same rate of simple interest in percent per annum, if a princip...

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  6. Solve: x/(x+1)+(x+1)/x = 2 1/12 (x!=0,-1)

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  7. If the price of 1 dozen pin is reduced by 2 paisa, then 6 more pins wi...

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  8. If x - sqrt((sqrt5+1)/(sqrt5-1)), show that x^2-x-1=0

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  9. y is sum of two variables, one in which varies directly with x and ano...

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  10. If (x^2-yz)/a=(y^2-zx)/b=(z^2-xy)/c , show that (a+b+c)(x+y+z)=(ax+by...

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  11. If b/(a+b)= (a+c-b)/(b+c-a)=(a+b+c)/(2a+b+2c) where a+b-c !=0, show th...

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  12. Answer any one question : Prove that angles in the same segment of a c...

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  13. State and prove the convere of the Pythagoras theorem.

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  14. ABCD is a cyclic quadrilaterla. Extended AB and DC intersect at P. Pr...

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  15. In a isosceles triangle ABC , angleB is right angle. Bisector of angle...

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  16. Draw a triangle ABC whose BC = 5cm, BA = 5.5 cm and angleABC = 70^@ dr...

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  17. Geometrically find the value of sqrt(24).

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  18. Difference between two acute angles of the right angled triangled is (...

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  19. In triangleXYZ, angleY = 90^@. If XY = 2sqrt3 unit and XZ-YZ = 2 unit...

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  20. If angleA+angleB = 90^@, show that 1+(tan A)/(tan B) = sec^2B tan^2A.

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