| 1 |
If x and y are independent random variables, then E(xy) |
- A. E(xy)
- B. xE(y)
- C. E(x)
- D. E(x)E(y)
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| 2 |
When two dice are rolled, the maximum totla on the two faces of dice will be. |
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| 3 |
For a constant k, the variance of k is |
- A. zero
- B. k<sup>2</sup>
- C. k
- D. none of these
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| 4 |
Waht is the probability that a ball drawn at random from the bag is. |
- A. 0.1
- B. 0.4
- C. 1.0
- D. Cannot be determined from given information
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| 5 |
The probability of getting one red ball from a bag constaining 4 red, 3 white and 3 black balls is. |
- A. 3/10
- B. 1/5
- C. 2/5
- D. 1/2
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| 6 |
The probability of getting an odd number when a balanced die is rolled is. |
- A. 1/2
- B. 1/3
- C. 1/4
- D. 1/6
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| 7 |
For a constant K ,the variance of K. |
- A. Zero
- B. A<sup>-2</sup>
- C. K
- D. None of these
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| 8 |
Is the tossing of two perfect coins the probability at least one head occur is. |
- A. 1/4
- B. 1
- C. 1/2
- D. 3/4
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| 9 |
A lettter is chosen at random from the word STATITICS , The probability of getting a vowel is. |
- A. 1/5
- B. 3/10
- C. 1/2
- D. 2/5
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| 10 |
The sum of probabilities of events of a sample space is always. |
- A. Equal
- B. Discrete
- C. Continuous
- D. Always greater then oen
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