JAMB Mathematics questions: Probability

25 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Probability· JAMB

   A fair die is thrown once. What is the probability of NOT getting a 6?

   • A5/6
   • B1/6
   • C1/2
   • D1

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2. Question 2· Probability· JAMB

   Two fair dice are thrown. What is the probability that the total is 7?

   • A5/36
   • B7/36
   • C1/12
   • D1/6

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3. Question 3· Probability· JAMB

   A fair die is thrown once. What is the probability of getting a prime number?

   • A1/3
   • B1/2
   • C2/3
   • D1/6

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4. Question 4· Probability· JAMB

   Two coins are tossed together. What is the probability of getting at least one head?

   • A1/4
   • B1/2
   • C1
   • D3/4

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5. Question 5· Probability· JAMB

   Two fair dice are thrown. What is the probability that the total score is 12?

   • A1/12
   • B1/36
   • C1/6
   • D2/36

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6. Question 6· Probability· JAMB

   Two fair dice are thrown. What is the probability that the total is less than 4?

   • A1/12
   • B1/6
   • C1/9
   • D1/36

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7. Question 7· Probability· JAMB

   A bag contains 4 red and 6 blue balls. Two balls are drawn one after the other without replacement. Find the probability that both are red.

   • A1/5
   • B4/25
   • C2/15
   • D2/9

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8. Question 8· Probability· JAMB

   A bag contains 4 white and 6 black balls. One ball is picked at random. Find the probability that it is white.

   • A3/5
   • B2/5
   • C2/3
   • D1/4

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9. Question 9· Probability· JAMB

   A box contains 5 red and 3 blue balls. Two balls are drawn at random without replacement. Find the probability that one is red and one is blue.

   • A15/64
   • B15/28
   • C3/28
   • D½

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10. Question 10· Probability· JAMB

    A bag holds 3 red, 4 green and 5 blue balls. One ball is drawn. Find the probability that it is not green.

    • A2/3
    • B1/3
    • C5/12
    • D1/4

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11. Question 11· Probability· JAMB

    The probabilities that two marksmen hit a target are 0.5 and 0.4. They shoot independently. Find the probability that both miss.

    • A0.9
    • B0.2
    • C0.1
    • D0.3

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12. Question 12· Probability· JAMB

    A card is drawn at random from a pack of 52 playing cards. What is the probability that it is an ace?

    • A4/13
    • B1/52
    • C1/4
    • D1/13

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13. Question 13· Probability· JAMB

    A card is drawn at random from a pack of 52 playing cards. What is the probability that it is a red king?

    • A1/52
    • B1/13
    • C1/26
    • D1/4

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14. Question 14· Probability· JAMB

    A and B are mutually exclusive events with P(A) = 1/3 and P(B) = 1/4. Find P(A or B).

    • A1/7
    • B1/12
    • C7/12
    • D2/7

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15. Question 15· Probability· JAMB

    The probabilities that A and B pass an examination are 2/3 and 3/4, independently. Find the probability that both pass.

    • A1/12
    • B17/12
    • C1/2
    • D5/7

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16. Question 16· Probability· JAMB

    A and B are independent events with P(A) = 0.3 and P(B) = 0.5. Find P(A and B).

    • A0.2
    • B0.8
    • C0.15
    • D0.35

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17. Question 17· Probability· JAMB

    If the probability that an event happens is 0.4, the probability that it does not happen is

    • A0.6
    • B0.4
    • C1.4
    • D0.16

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18. Question 18· Probability· JAMB

    A card is drawn from cards numbered 1 to 30. What is the probability that it is a multiple of 6?

    • A1/6
    • B1/5
    • C1/30
    • D5/6

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19. Question 19· Probability· JAMB

    A bag contains 3 red and 5 green balls. One ball is drawn at random. What is the probability that it is not red?

    • A5/8
    • B3/8
    • C3/5
    • D1/8

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20. Question 20· Probability· JAMB

    Two fair coins are tossed together. What is the probability of getting exactly one head?

    • A¾
    • B¼
    • C½
    • D1/3

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