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If p, q, r be the roots of the equation ...

If p, q, r be the roots of the equation `x^3 + ax - b = 0`, then the value of pqr will be

A

a

B

1

C

b

D

0

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UNITED BOOK HOUSE-Techno India Group Academia South Kolkata, Question Paper -Exercise
  1. If A.M. and coefficient of variation of x is 6 and 50% respectively, t...

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  2. For a set of positive quantities, Prove that A.M. ge GM ge H.M..

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  3. If p, q, r be the roots of the equation x^3 + ax - b = 0, then the val...

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  4. Given 2 mutually exclusive events A and B such that P(A) = 0.45, P(B) ...

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  5. Two fair dice are thrown. If the sum of two nos. obtained is 8, then t...

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  6. For a positively skewed distribution, what is the relation between mea...

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  7. If the number of educated persons is 65% of the population, then in pi...

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  8. If the mean and median of a distribution is 5 and 6 respectively, then...

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  9. If 2u = 5x and the harmonic mean of x is 0.4, then find the harmonic m...

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  10. If P(A) = 2/3, P(B) = 1/2 and P(A uu B) = 3/4 then find the value of P...

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  11. If P(A) = 2/3, P(B) = 1/2 and P(A uu B) = 3/4 then find the value of P...

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  12. If P(A) = 2/7, P(B) = 6/11, what is the probability that at least one ...

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  13. What is the value of Sheppard's correction of moments for m4?

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  14. State anyone of the Pearson's measure of skewness.

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  15. State true or false : "Index number is a unit-free number".

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  16. If the standard deviation of the set of nos. 1, 2, 3,….,k is 2, then f...

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  17. If the A.M. and G.M. of two positive real nos. are 45 and 9 respective...

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  18. Show that the sum of deviations of a set of observations about their m...

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  19. In a group of 20 males and 5 females, 10 males and 3 females ae servic...

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  20. If A, B, C are three independent events such that P(A) = 1/4, P(B) = 1...

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