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AMO 2017 Secondary 2 (Grade 8) Question 8

AMO · AMO 2017 Secondary 2 (Grade 8)

Question 8

The spinner is divided into five equal parts. Spin once. If the needle lands on a perfect square, flip a fair coin once; if it lands on a prime number, do not flip the coin. What is the probability that you did not flip a coin? A fair coin lands on heads half the time. If the probability is $p/q$ in simplest form, write $p+q$.

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