JAMB Mathematics 2025 Objective — Question 22
Question 22 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2025 Objective paper, with the correct answer and a full explanation.
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The probability of picking a red ball from a bag is 2/5. If there are 10 red balls, how many balls are in the bag?
- A. 15
- B. 30
- C. 25Correct
- D. 20
Explanation
Prob=10/n=2/5 ⇒ n = (5×10)/2 = 25.
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