The main averages, which can also be referred to as measures of central tendency, are the mean, mode and median. Robert is preparing for his Mathematics GCSE exams. Each paper is marked out of 100.
To find the mean: (5.2 + 5.6 + 5.7) ÷ 3 = 5.5 seconds. Tip: Calculate the numbers in brackets first. If using a calculator, press enter afterwards, before moving onto the rest of the calculation.
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