Another bag contains 15 red beads and 10 yellow beads. Ariana picks a bead at random, records its colour and replaces it in the bag. She then picks another bead at random. Find the probability that she does not pick two red beads. .............................................
Exam No：0580_w20_qp_41 Year：2020 Question No：9(c)(ii)
Answer:
\(\frac{16}{25}\) oe
Knowledge points:
E8.3 Understand that the probability of an event occurring = 1 – the probability of the event not occurring.
E8.5 Calculate the probability of simple combined events, using possibility diagrams, tree diagrams and Venn diagrams. (In possibility diagrams, outcomes will be represented by points on a grid, and in tree diagrams, outcomes will be written at the end of branches and probabilities by the side of the branches.)
Solution:
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