JAMB Mathematics questions: Probability

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

1. Question 21· Probability· JAMB

   A number is chosen at random from 1 to 20. What is the probability that it is a multiple of 4?

   • A½
   • B⅕
   • C1/10
   • D¼

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   Explanation and discussion

2. Question 22· Probability· JAMB

   Two fair dice are tossed. Find the probability that the sum is less than 4.

   • A1/6
   • B1/12
   • C1/9
   • D1/18

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   Explanation and discussion

3. Question 23· Probability· JAMB

   A bag contains 2 red and 3 blue balls. Two balls are drawn one after the other with replacement. Find the probability that both are blue.

   • A9/25
   • B3/10
   • C6/25
   • D3/5

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   Explanation and discussion

4. Question 24· Probability· JAMB

   A fair die is thrown once. What is the probability of getting an even number?

   • A1/3
   • B½
   • C1/6
   • D2/3

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   Explanation and discussion

5. Question 25· Probability· JAMB

   A fair coin is tossed three times. What is the probability of getting three heads?

   • A1/3
   • B1/8
   • C3/8
   • D1/6

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   Explanation and discussion