Printable · GCSE Foundation · ages 14-16

Possibility spaces for single and combined events worksheet — GCSE Foundation

Fifteen questions on "possibility spaces for single and combined events" — DfE statement P7. Print it, or print three versions so neighbours cannot copy by letter; the key gives the letter for each version.

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Possibility spaces for single and combined events worksheet — GCSE Foundation

Maths · GCSE Foundation · P7 · Possibility spaces for single and combined events · 15 questions

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1.Two ordinary fair dice are rolled. Work out the probability that the difference between the two scores is 1.
(a)1/4
(b)1/6
(c)5/36
(d)5/18
2.Spinner A is numbered 1 to 3 and Spinner B is numbered 1 to 5. Both spinners are spun once, and every outcome is listed as a pair, one number from each spinner. Work out how many equally likely outcomes there are in total.
(a)3
(b)25
(c)8
(d)15
3.A padlock code is formed by arranging three different digits chosen from 2, 3, 4 and 5, with no digit repeated. Work out how many different three-digit codes can be made.
(a)64
(b)12
(c)6
(d)24
4.Two ordinary fair dice are rolled. Work out the probability that both dice show the same score.
(a)1/3
(b)1/6
(c)1/36
(d)1/2
5.Two fair four-sided dice, numbered 1 to 4, are rolled and the two scores are added together. Work out the probability that the total is 5.
(a)1/16
(b)1/4
(c)1/8
(d)3/16
6.A red fair dice and a blue fair dice are rolled together. Every outcome is listed as an ordered pair, red score then blue score. Work out the probability that the red score is less than the blue score.
(a)7/12
(b)5/12
(c)5/36
(d)1/2
7.Spinner P and Spinner Q are each fair and have 5 equal sections, numbered 1 to 5. Both spinners are spun once, and every outcome is listed as an ordered pair, Spinner P then Spinner Q, such as (2, 4). Work out how many of the outcomes have the score on Spinner P less than the score on Spinner Q.
(a)4
(b)10
(c)15
(d)20
8.In a board game Mia moves forward by the total of two ordinary fair dice. Work out the probability that her total is 7. Give your answer as a fraction in its simplest form.
(a)1/6
(b)6/11
(c)1/7
(d)7/36
9.Two ordinary fair dice are rolled and the two scores are added together. Work out the probability that the total is a prime number.
(a)13/36
(b)19/36
(c)7/18
(d)5/12
10.A fair coin is flipped and a fair three-sided spinner, labelled X, Y and Z, is spun. Every outcome is listed as a pair, such as (H, X). Work out the probability that the outcome is a head and Z.
(a)1/2
(b)1/6
(c)1/3
(d)1/5
11.A pack contains 6 cards, numbered 1 to 6. A card is drawn at random from the pack, and a fair coin is flipped. Work out the probability of drawing an even-numbered card and the coin landing on tails.
(a)1/8
(b)1/4
(c)1/12
(d)1/2
12.Spinner E has 4 equal sections, numbered 1 to 4. Spinner F has 6 equal sections, numbered 1 to 6. Both spinners are spun once. Work out the probability of getting at least one 3.
(a)3/8
(b)1/4
(c)5/12
(d)5/8
13.A fair four-sided dice, numbered 1 to 4, is rolled twice. Every outcome is listed as an ordered pair, first roll then second roll, such as (2, 3). Work out how many different outcomes are in the list.
(a)16
(b)8
(c)10
(d)4
14.Spinner A has 4 equal sections, numbered 1, 2, 3 and 4. Spinner B has 3 equal sections, coloured red, red and blue. Both spinners are spun once. Work out the probability of getting an even number on Spinner A and red on Spinner B.
(a)1/3
(b)1/6
(c)1/4
(d)5/6
15.Two ordinary fair dice are rolled and the two scores are multiplied together. Work out the probability that the product is odd.
(a)3/4
(b)1/2
(c)1/12
(d)1/4

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