The list below shows the marks for 20 students on a recent test out of 42. 40 28 28 30 20 25 38 40 26 10 36 25 42 21 34 37 30 23 24 36 a) What mark would the 70 th percentile?  b) What percentile is a mark of 30? What would this mean?  c) What percentile is a mark out of 42?

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