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If ui = (xi-25)/10 sumfiui = 20 and sumf...

If `u_i = (x_i-25)/10 sumf_iu_i = 20` and `sumf_i = 100`, find `barx`.

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UNITED BOOK HOUSE-VIDYASAGAR VIDYAPITH MIDNAPORE-EXERCISE
  1. If the lengh of diagonal of a cube is 6 cm then find the total surface...

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  2. The length of radius of a right circular cylinder is decreased by 50% ...

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  3. If ui = (xi-25)/10 sumfiui = 20 and sumfi = 100, find barx.

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  4. At present the sum of the number of students in all the secondary inst...

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  5. Pradipbabu and Aminabiib started a business jointly by investing Rs 24...

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  6. Solve : (x+3)/(x-3)+(x-3)/(x+3)= 2 1/2,x!=+-3.

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  7. The spedd of a boat in still water is 8 km/hr. if the boat can go 15...

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  8. If x= (sqrt7+sqrt3)/(sqrt7-sqrt3) and xy = 1, find the value of (x^2+3...

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  9. If 5 men can cultivate om 10 bighas of land in 9 days, calculate by t...

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  10. If a,b,c,d are in continued proportion then show that (b-c)^2+(c-a)^2+...

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  11. 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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  12. Prove that the front angle formed at the centre of a circle by an arc,...

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  13. State and Prove 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. Two chords AB and AC of the larger of two concentrci circles touch the...

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  16. Draw a square whose length of each side is sqrt(24) cm. Calculate its ...

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  17. Draw a right angled triangle length of hypotenuse and one of another s...

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  18. The length of radius of a circle is 28 cm. Determine the circular val...

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  19. If 5 sin^2 theta+4 cos^2 theta = 9/2 , find the value of tan theta.

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  20. Find the value of cot 12^@ cot38^@cot 52^@cot78^@cot60^@.

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