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When a biased 6-sided dice is thrown once, the probability that it will land on 4 is 0.65 - Edexcel - GCSE Maths - Question 5 - 2018 - Paper 3
Question 5
When a biased 6-sided dice is thrown once, the probability that it will land on 4 is 0.65. The biased dice is thrown twice. Amir draws this probability tree diagram.... show full transcript
Worked Solution & Example Answer:When a biased 6-sided dice is thrown once, the probability that it will land on 4 is 0.65 - Edexcel - GCSE Maths - Question 5 - 2018 - Paper 3
Step 1
1. Probabilities should total to 1
Answer
In the probability tree diagram, the probabilities for landing on 4 and not landing on 4 in both the first and second throws should sum to 1. For instance, the chance of landing on 4 is 0.65, meaning the probability of not landing on 4 should be 0.35, as 0.65 + 0.35 = 1.
Step 2
2. Probabilities on the diagram are reversed
Answer
The probabilities listed for the branches on the second throw are incorrect. Specifically, the probability of landing on 4 and not landing on 4 for the second throw should be correctly presented as 0.65 and 0.35, respectively, following the assigned probabilities.