Question 9 of 55beginner🔧 ApplyShort Answer3 marks
A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be (i) red ? (ii) white ? (iii) not green?
(i)
red?
Answer
5/17
(ii)
white?
Answer
8/17
(iii)
Answer
13/17
Explanation
This question tests the basic probability formula P(E) = Number of favorable outcomes / Total number of possible outcomes. The key insight is that 'not green' includes both red and white marbles, which can be calculated either directly or using the complement rule P(not Green) = 1 - P(Green).