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Teacher's Notes Topic: Probability

A teacher has some coins in his pocket. He is going to take one of the coins at random. He says:. A. There are more than four coins in my pocket. B. The total value of the coins is 25p. C. The probability that I will take a 1p coin is ¼. List all the coins that could be in his pocket.

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Teacher's Notes Topic: Probability

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  1. A teacher has some coins in his pocket. He is going to take one of the coins at random. He says: A. There are more than four coins in my pocket. B. The total value of the coins is 25p. C. The probability that I will take a 1p coin is ¼ List all the coins that could be in his pocket. Coins Teacher's Notes Topic: Probability L7 Try the original question (briefly) Version 2: the question but without statement C Version 3: the question but without statement B Version 4: the question but without statement A Now repeat the original question. Which of the 'Versions' made it easiest to answer the original question? Why can't there be 6 coins? How many different answers are there?

  2. Coins Original version A teacher has some coins in his pocket. He is going to take one of the coins at random. He says: A. There are more than four coins in my pocket. B. The total value of the coins is 25p. C. The probability that I will take a 1p coin is ¼ List all the coins that could be in his pocket.

  3. Coins Version 2 A teacher has some coins in his pocket. He is going to take one of the coins at random. He says: A. There are more than four coins in my pocket. B. The total value of the coins is 25p. C. The probability that I will take a 1p coin is ¼ List all the coins that could be in his pocket.

  4. Coins Version 3 A teacher has some coins in his pocket. He is going to take one of the coins at random. He says: A. There are more than four coins in my pocket. B. The total value of the coins is 25p. C. The probability that I will take a 1p coin is ¼ List all the coins that could be in his pocket.

  5. Coins Version 4 A teacher has some coins in his pocket. He is going to take one of the coins at random. He says: A. There are more than four coins in my pocket. B. The total value of the coins is 25p. C. The probability that I will take a 1p coin is ¼ List all the coins that could be in his pocket.

  6. Coins Original version A teacher has some coins in his pocket. He is going to take one of the coins at random. He says: A. There are more than four coins in my pocket. B. The total value of the coins is 25p. C. The probability that I will take a 1p coin is ¼ List all the coins that could be in his pocket.

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