2025 GESS PRELIMS P1 Q17

2025 GESS PRELIMS P1 Q17

Secondary 4
5 marks

Mrs Chan has four 50-cent coins and six 10-cent coins in her purse. She takes out two coins at random from her purse, one after another.

  1. Complete the tree diagram below.[1]
  2. Find the probability that
    1. the total amount of the two coins taken is exactly 60 cents.[2]
    2. at least one 50-cent coin is taken.[2]

Solution:

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Answer:(a) \(\frac35,\frac25,\frac59,\frac49,\frac23,\frac13\) (b)(i) \(\frac8{15}\) (b)(ii) \(\frac23\)

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