Jamb Mathematics Questions - Probability
Question 36:
A bag contains 5 black, 4 white and x red marbles. If the probability of picking a red marble is 2/3, find the value of x
View Answer & ExplanationQuestion 37:
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 <sup style='font-size: smaller;'>6</sup>/<sub style='font-size: smaller;'>30</sub>
- B <sup style='font-size: smaller;'>5</sup>/<sub style='font-size: smaller;'>30</sub>
- C <sup style='font-size: smaller;'>17</sup>/<sub style='font-size: smaller;'>30</sub>
- D <sup style='font-size: smaller;'>11</sup>/<sub style='font-size: smaller;'>30</sub>
Question 38:
The probability of picking a letter T from the word OBSTRUCTION is
- A <sup style='font-size: smaller;'>1</sup>/<sub style='font-size: smaller;'>11</sub>
- B <sup style='font-size: smaller;'>2</sup>/<sub style='font-size: smaller;'>11</sub>
- C <sup style='font-size: smaller;'>3</sup>/<sub style='font-size: smaller;'>11</sub>
- D <sup style='font-size: smaller;'>4</sup>/<sub style='font-size: smaller;'>11</sub>
Question 39:
The result of rolling a fair die 150 times is as summarized in the table above. What is the probability of obtaining a 5
- A <sup style='font-size: smaller;'>3</sup>/<sub style='font-size: smaller;'>10</sub>
- B <sup style='font-size: smaller;'>1</sup>/<sub style='font-size: smaller;'>5</sub>
- C <sup style='font-size: smaller;'>1</sup>/<sub style='font-size: smaller;'>6</sub>
- D <sup style='font-size: smaller;'>1</sup>/<sub style='font-size: smaller;'>10</sub>
Question 40:
If three unbiased coins are tossed, find the probability that they are all heads
- A \(\frac{1}{2}\)
- B \(\frac{1}{3}\)
- C \(\frac{1}{9}\)
- D \(\frac{1}{8}\)