Course home

4.1.1 Probability (A-level only)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108

Question 27

A bag contains 10 blue counters, 8 red counters and 6 green counters. Two counters are removed from the bag at random.

Draw a tree diagram to represent this information

[3]

Find the probability that the two counters removed are both green

[2]

Given that at least one of the counters removed is red, find the probability that both counters are red.

[3]

Markscheme

4.1.1 Probability (A-level only) Questions

A Level
Maths
4.1.1 Probability (A-level only)

111 exam-style questions on WJEC A Level Maths 4.1.1 Probability (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

4.1.1 Probability (A-level only)

Question bank

4.1.1 Probability (A-level only)

Medium Hard

Question 27

A bag contains 10 blue counters, 8 red counters and 6 green counters. Two counters are removed from the bag at random.

Draw a tree diagram to represent this information

[3]

Find the probability that the two counters removed are both green

[2]

Given that at least one of the counters removed is red, find the probability that both counters are red.

[3]

Markscheme

4.1.1 Probability (A-level only) Questions

A Level
Maths
4.1.1 Probability (A-level only)

111 exam-style questions on WJEC A Level Maths 4.1.1 Probability (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.