WAEC Mathematics 2023 Objective — Question 32
Question 32 of 50 from the West African Examinations Council (WAEC) Mathematics 2023 Objective paper, with the correct answer and a full explanation.
Advertisement
A bag contains 4 white marbles and 3 blue marbles. Another bag contains 5 red marbles and 6 blue marbles. If a marble is picked at random from each bag, find the probability that they are of the same colour.
- A. 1/2
- B. 18/77Correct
- C. 11/12
- D. 1/3
Explanation
P(same colour)=P(both blue)=P(blue from bag1)×P(blue from bag2)=(3/7)×(6/11)=18/77 (since colours matching across the two differently-composed bags is only possible for blue).
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.