Junior Cycle (Ireland) · Mathematics

Data Handling

9 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 9 questions

  1. Find the mode of 15, 23, 8, 8, 16, 8.
  2. Find the range of 2, 3, 7, 10, 11.
  3. The mean of 5 numbers is . A new number is added. What is the new mean?
  4. Find the mean of the numbers 16, 20, 6, 2, 6.
  5. A bag has 5 red balls and 6 white balls. Two balls are drawn one after another without replacement. Find the probability that both are red.
  6. A bag has 7 red balls and 4 white balls. Two balls are drawn one after another without replacement. Find the probability that both are red.
  7. A bag has 7 red balls and 5 white balls. A ball is drawn, replaced, and then a second ball is drawn. Find the probability that the two balls are of different colours.
  8. A bag has 5 red balls and 2 white balls. Two balls are drawn one after another without replacement. Find the probability that both are red.
  9. A bag has 4 red balls and 2 white balls. A ball is drawn, replaced, and then a second ball is drawn. Find the probability that the two balls are of different colours.

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