Maths formulas

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Last updated 5:24 PM on 6/8/26
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7 Terms

1
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What is the formula for probability?

Favourable outcome / total outcome

2
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What is the formula to work out probability of one part in a probability?

Total probability x wanted parts/total parts

3
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How to work out the number used to multiply the probability for the amount?

Amount x probability

4
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How to work out the estimate for the number of times of something

Expected number = total trials x probability

5
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How to work out cumulative frequency questions

  • Median → divide total frequency by 2

  • Lower quartile Q_1 → divide by 4

  • Upper quartile Q_3 → x3, divide by 4

By the total frequency

6
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Sin rule

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7
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