1) A box contains 30 red marbles numbered 1-30. It also contains 40 blue marbles numbered 1-40. A marble is drawn from the box at random. Which of these events is the least likely? a) The marble is red b) The chosen number is a multiple of 4 c) The marble is blue and the number is odd d) The marble is red and the number is even e) The chosen marble is 3 or contains at least one digit which is 3 2) A jar contains 15 red candies numbered 1-15 and 20 blue candies numbered 1-20. A candy is drawn randomly. Which of these events is the least likely? a) The candy is red b) The chosen number is a multiple of 5 c) The candy is blue and the number is odd d) The candy is red and the number is even e) The chosen candy is 5 or contains the digit 5 3) A basket contains 25 apples numbered 1-25 and 30 oranges numbered 1-30. A fruit is drawn randomly. Which of these events is the least likely? a) The fruit is an apple b) The chosen number is a multiple of 6 c) The fruit is an orange and the number is even d) The fruit is an apple and the number is odd e) The chosen fruit is 4 or contains the digit 4 4) A basket contains 18 red apples numbered 1-18 and 27 green apples numbered 1-27. An apple is drawn randomly. Which of these events is the most likely? a) The apple is red b) The chosen number is a multiple of 4 c) The apple is green and the number is odd d) The apple is red and the number is even e) The chosen apple is 1 or contains the digit 1 5) A jar contains 20 black marbles numbered 1-20 and 30 white marbles numbered 1-30. A marble is drawn randomly. Which of these events is the most likely? a) The marble is black b) The chosen number is a multiple of 5 c) The marble is white and the number is even d) The marble is black and the number is odd e) The chosen marble is 5 or contains the digit 5 6) A box contains 22 purple pens numbered 1-22 and 28 orange pens numbered 1-28. A pen is drawn randomly. Which of these events is the most likely? a) The pen is purple b) The chosen number is a multiple of 2 c) The pen is orange and the number is odd d) The pen is purple and the number is even e) The chosen pen is 2 or contains the digit 2

11+ Maths Probability

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