Shonda's 6 test scores have an arithmetic mean of 78%. After removing 1 test score, the new arithmetic mean of the 5 remaining scores is 84%. Which test score was removed?
Accepted Solution
A:
Answer:48Step-by-step explanation:Let the scores be a,b,c,d,e,f.So sum of these scores = mean * 6 = 78 X 6 After say removing test score a, mean = 84 % So sum of these remaining scores = mean * 5 = 84 X 5 Having calculated these two, the removed score = difference of the two sums.So removed test score = 78 X 6 - 84 X 5 = 48