Question

suppose that the mean score of a class of 34 students was 73. the 19 male students in the class had a mean score of 66. what was the mean score for the 15 female students?

Answer 1

Explanation:

sum(34 scores) / 34 = 73

sum(19 male scores) / 19 = 66

sum(34 scores) = 73×34 = 2,482

sum(19 male scores) = 66×19 = 1,254

sum(34 scores) = sum(19 male scores) + sum(15 female scores) =

= sum(19 male scores) + (female mean score)×15

2,482 = 1,254 + (female man score)×15

1,228 = (female mean score)×15

female mean score = 1,228 / 15 = 81.8666666...