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2.5 methods to find expected number of model B - Edexcel - GCSE Maths - Question 5 - 2022 - Paper 1

Question 5

2.5 methods to find expected number of model B. $$E = n \cdot p$$ where: - $n = 40000$ (total number) - $p = \frac{15}{100}$ (probability of model B) Substituting... show full transcript

Worked Solution & Example Answer:2.5 methods to find expected number of model B - Edexcel - GCSE Maths - Question 5 - 2022 - Paper 1

Step 1

Method to find expected number of model B

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Answer

To find the expected number of model B, we use the formula:

$E = n \cdot p$

where:

$n$ is the total number of items (in this case, 40000), and
$p$ is the probability of selecting model B (15% or 0.15).

Substituting these values:

$E = 40000 \cdot 0.15 = 6000$

Step 2

Final answer for expected number of model B

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Answer

The expected number of model B is 6000.

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