In 2016, the mean score on the ap statistics exam was 2.80, with a standard deviation of 1.35. the mean score on the ap calculus exam was a 2.86, with a standard deviation of 1.55. what is the combined mean and standard deviation for these exams?

mean, 2.83; standard deviation, 0.2

mean, 5.66; standard deviation, 2.9

mean, 5.66; standard deviation, 2.055

mean, 2.83; standard deviation, 2.9

mean, 5.66; standard deviation, 4.225