A basket holds 8 blue, 5 yellow and 11 pink ribbons. One ribbon is pulled out at random. What is the probability that the ribbon is not yellow?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → \(\frac{19}{24}\)
A ribbon that is not yellow is one of the other colours, so the favourable ribbons are the blue and pink ribbons together.
Total ribbons \(=8+5+11=24\)
Ribbons that are not yellow \(=8+11=19\)
Probability \(\displaystyle =\frac{19}{24}\)