MATHEMATICS

JAMB 2018 - Question 18

Mathematics 2018 JAMB Past Questions - Question 18: The probabilities that John and james pass examination are 3/4 and 3/5 respectively.Find the probability of both boys failing the examination.

The probabilities that John and james pass examination are 3/4 and 3/5 respectively.Find the probability of both boys failing the examination.
A:
B:
C:
D:
Examkits App

Examkit's JAMB CBT App

Practice JAMB offline with our Online, PC and Mobile App

  • ✅ 25+ years of past questions (2000 to 2025)
  • ✅ Video solutions and explanation to questions
  • ✅ E-library
  • ✅ Study by topic
  • ✅ And more.

Correct Answer

D

Explanation

Probability of John failing = 1- 3/4 = 1/4probability of James failing = 1 - 3/5 = 2/5Probability of both failing = 1/4 x 2/5 = 1/10To find the probability of both boys failing the examination, we can use the fact that the probability of an event occurring plus the probability of the event not occurring equals 1.Let's denote the probability of passing as P(pass) and the probability of failing as P(fail).For John, the probability of passing is 3/4, so the probability of failing is 1 - 3/4 = 1/4.For James, the probability of passing is 3/5, so the probability of failing is 1 - 3/5 = 2/5.Now, to find the probability of both boys failing, we multiply their individual probabilities of failing:P(both failing) = P(fail for John) * P(fail for James)P(both failing) = (1/4) * (2/5)P(both failing) = 2/20P(both failing) = 1/10Therefore, the probability of both boys failing the examination is 1/10.

Frequently Asked Questions

Examkits is a JAMB CBT practice platform that provides over 20 years of past questions, Post UTME questions, and detailed video solutions to help students prepare for their exams.

You can practice JAMB past questions online, on Android, or on a desktop using the Examkits app. Just register on our website and choose your preferred device.

Yes. Our Android and Windows versions support offline usage. Once downloaded and activated, no internet is required to use most of the features.

Yes, Examkits provides detailed video explanations for all JAMB past questions from 2000 to 2024, helping students understand how to solve each problem.

Examkits offers free practice for some subjects. However, full access requires a one-time affordable activation fee for each version of the app.