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Arithmetic mean of 1, 2, 3,..-..... , 10...

Arithmetic mean of 1, 2, 3,..-..... , 100 (1st 100 positive integers) is

A

a)50

B

b)50.5

C

c)51.5

D

d)49.5

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 13-EXERCISE
  1. If y = x +1/x , then dy/dx = 0 at the point

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  2. Two dice are thrown at a time. The probability that the sum of two num...

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  3. Arithmetic mean of 1, 2, 3,..-..... , 100 (1st 100 positive integers) ...

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  4. If R = {(x, y) : x in N, yin N and 2x + y = 10}. then find R^-1

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  5. Write P = {2, 4, 8, 16, 32, 64} in set builder form.

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  6. Find the viaue of tan 28^@ + tan 17^@ + tan 28^@tan 17^@

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  7. Solve :sin 3theta = cos 3theta (0 < theta < pi)

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  8. Find the amplitude of i/(1-i).

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  9. In how many different ways 4 boys and 3 girls can be sitted in one row...

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  10. Find the middle term of the expansion of (a^2/3+3/a^2)^8

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  11. The sum of the 1st m terms of an AP is n and the sum of the 1st n term...

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  12. The co-ordinate of the vertices of a triangle are (2, -2), (4, 2) and ...

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  13. Find the co-ordinate of that point which divides the line segment join...

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  14. show that lim(nrarr0)(root(3)(n+1)-1)/n=1/3

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  15. If y = x/(x+a),show that x dy/dx = y (1- y)

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  16. A box contains 50 articles of which 4 are defective. One article is ta...

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  17. Find the mean deviation of 36, 72, 46,60, 42, 45, 53. 46, 51, 49.

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  18. For any three sets A, B, C, Prove that A cap(BcupC)=(AcapB)cup (A cap ...

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  19. If tan (theta/2)=tan^3 (phi/2)and tanphi=2tanalpha,then prove that the...

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  20. In a triangle ABC if a cos^2(C/2)+c cos^2(A/2)=((3b)/2)show that sides...

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