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Thursday, 11 June 2026
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Mathematics Past Questions and Answers

Topic: Probability

Jamb Mathematics Questions - Probability

Question 31:
Some white balls put in a basket containing twelve red balls and sixteen black balls. If the probability of picking a white balls from the baskets is 3/7, how many white balls were introduced?
  • A 12
  • B 21
  • C 28
  • D 32
View Answer & Explanation
Question 32:
An unbiased die is rolled 100 times and the outcome is tabulated above.
What is the probability of obtaining a 5?
  • A 1/5
  • B 1/2
  • C 1/6
  • D 1/4
View Answer & Explanation
Question 33:
A container has 30 gold medals, 22 silver medals and 18 bronze medals. If one medals is selected at the random from the container, what is the probability that it is not a gold medal?
  • A 9/35
  • B 11/35
  • C 4/7
  • D 3/7
View Answer & Explanation
Question 34:
A box contains 5 blue balls, 3 red balls and 2 white balls. Two balls are selected from the box with replacement. Find the probability of obtaining two blue or two red balls
  • A 17/50
  • B 3/25
  • C 1/50
  • D 3/250
View Answer & Explanation
Question 35:
What is the probability that an integer x,(1 \(\leq\) x \(\leq\) 20) chosen at random is divisible by both 2 and 3?
  • A 1/20
  • B 1/3
  • C 3/20
  • D 7/10
View Answer & Explanation