Probability Jamb Mathematics Past Questions
Question 16
A binary operation on the set of rational numbers is defined as \(x \ast y = \frac{x^2 - y^2}{2xy}\). Find \(-5 \ast 3\)
- A. \(\frac{-8}{15}\)
- B. \(\frac{8}{15}\)
- C. \(\frac{17}{15}\)
- D. \(\frac{-17}{15}\)
Question 17
In a basket, there are 6 grapes, 11 bananas and 13 oranges. If one fruit is chosen at random. What is the probability that the fruit is either a grape or a banana
- A. 6/30
- B. 5/30
- C. 17/30
- D. 11/30
Question 18
The probability of picking a letter T from the word OBSTRUCTION is?
- A. 1/11
- B. 2/11
- C. 3/11
- D. 4/11
Question 19
The probability of a student passing any examination is 2/3. If the students takes three examination, what is the probability that he will not pass any of them?
- A. 2/3
- B. 4/9
- C. 8/27
- D. 1/27
Question 20
| Marks | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|
| No. of students | 3 | 4 | 1 | 0 | 4 | 5 | 2 | 1 |
- A. 3/5
- B. 2/5
- C. 7/20
- D. 1/5
