| 1 |
When two coins are tossed simultaneously, P (one head ) is. |
- A. 1/2
- B. 1/4
- C. 3/4
- D. 1.0
|
| 2 |
The probability of a continuous random variable at x = a is --------------- |
- A. One
- B. Zero
- C. Between 0 and 1
- D. More than one
|
| 3 |
When a pair of dice is rolled, the sum of upperemost dots vary from. |
- A. 0 to 10
- B. 1 to 11
- C. 2 to 19
- D. 2 to 12
|
| 4 |
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
|
| 5 |
A student soved 25 questions from first 50 questios of a book to be solved. The prob, that he will solve the remaining all questions. |
- A. 0.25
- B. 0.51
- C. 1
- D. 0
|
| 6 |
Var (3x+2) |
- A. 3Var(x) + 2
- B. 9Var(x) +2
- C. Var (x) + 0
- D. 3Var (X)
|
| 7 |
For two independent random variables, Var(x) = 14 and Var(Y ) = 5, then var (X-y) is equal to. |
- A. 9
- B. 70
- C. 19
- D. None of these
|
| 8 |
E(X ± Y) =.............. |
- A. E(X) + E(Y)
- B. E(X) - E (Y)
- C. E(x) ± E (Y)
- D. None of these
|
| 9 |
Var (B/aX) =? |
- A. 1/aVar(X)
- B. b<sup>2</sup>/a<sup>2</sup> Var(X)
- C. b<sup>2</sup>/a Var(X)
- D. None of these
|
| 10 |
The numbered balls are paced in an urn, Numbers 1- 4 are red and numbers 5 -10 are blue. the probability that a ball drawn at random from the run is blue is. |
- A. 0.1
- B. 0.4
- C. 0.6
- D. 1.0
|
