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# 1. The diagram below shows the probabilities for events A and B, with P(A′) = p. (a) Write down the value of p.

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(1)

IB Questionbank Maths SL 1

(1)

(3)

## (c) Find P(A′ | B).

(3) (Total 7 marks)

(Total 6 marks)

## 3. The events A and B are independent such that P(B) = 3P(A) and P(AB) = 0.68. Find P(B)

(Total 6 marks)

(2)

IB Questionbank Maths SL 2

(5)

(4)

## student takes only music and the second student takes only art.

(4) (Total 13 marks)

(3)

## Find the percentage of boxes that should be made by machine B to achieve this.

(4) (Total 7 marks)

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