Edexcel IGCSE Math A 6.3.J expected frequency

Practise expected-frequency questions by multiplying the probability by the number of trials or using totals to complete probability tables.

Exam points

Calculate expected frequency by multiplying probability by the number of trials.
Use probabilities in a table to estimate counts for spinner colours or outcomes.
Complete missing probabilities before using them to find expected numbers.

[Maximum number: 2]

Eight people play a computer game.
Here are their scores.
7
10
8
9
12
9
10
10

Work out an estimate for the number of times she will score 9 or more in these 60 games.

60\times\frac56=50

Final answer:

M1.
A1.
NB: $\frac{50}{60}$ gains M1 A0.

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