The Jackson triplets , Jenny , John and James , are in different algebra classes at city high . On their final exams, Jenny scored 77 on a test with a mean of 69 and a standard deviation of 11;John scored 79 on a test with a mean of 73 and a standard deviation of 9 ; and James scored 75 on a test with a mean of 67 and a standard deviation of 10 . Who had the best score ?
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