Question 17 — IGCSE 0580 Specimen 2025 Paper 11
Cambridge IGCSE Mathematics 0580, Core tier, non-calculator. Topic: Probability · General. Worth 4 marks.
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Question text
17 Two bags, A and B, each contain blue beads and white beads only.
The probability of taking a blue bead at random from bag A is 0.8 .
The probability of taking a blue bead at random from bag B is 0.3 .
(a) Complete the tree diagram.
Bag A Bag B
Blue
0.3
Blue
0.8
White
............
............ Blue
............ White
White
............
[2]
(b) A student takes one bead at random from bag A and one bead at random from bag B.
Find the probability that both beads are white.
............................................... [2]
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