Mathematics (AS & A Level) · May / June 2026 · Paper 61 · Question 2
9709
As printed in the paper
The question as text
In the past, 2% of talking dolls made by a certain firm have been faulty. Following a change in the manufacturing process, a quality control officer suspects that the percentage of faulty talking dolls has increased. In order to test his suspicion, he selects 50 talking dolls at random. If the number of faulty talking dolls is more than 3, he will conclude that the percentage has increased.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
2(a)[1]
2(b)[1]
2(c)[3]
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