| 1 |
Why are the outcomes of a coin tossing mutually exclusive. |
- A. The outcome of any toss is not affected by teh outcome of those preceding it.
- B. Both a head and a tail cannot turn up on any one toss
- C. The probability of getting a head and the probability of getting a tail is the same.
- D. All of these
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| 2 |
Probability distribution of a continuous random variable can be presented by |
- A. tabular form
- B. Formula
- C. Curve
- D. None of these
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| 3 |
When two dice are rolled, the numebr of possible sample points is. |
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| 4 |
The coins are tossed, the porbability of two tails is euql to. |
- A. 1/2
- B. 1/4
- C. 3/4
- D. 1
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| 5 |
If the random variable x denotes the number of heads of when three distinct coins are tossed k the X assumes values. |
- A. 0,1,2,3
- B. 1,3,3,1
- C. 1,2,3
- D. 1,1,1,1
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| 6 |
E(X ± Y) =.............. |
- A. E(X) + E(Y)
- B. E(X) - E (Y)
- C. E(x) ± E (Y)
- D. None of these
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| 7 |
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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| 8 |
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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| 9 |
If x is a random variable with E(x) = 5 then E (3x - 2) = |
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| 10 |
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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