2 OK, so if Lauren’s first four test scores have an average of 86, then they have a sum of . To have a 90 average over six tests, she’ll need to get up to a sum of . That means that she needs to score a…
2 OK, so if Lauren’s first four test scores have an average of 86, then they have a sum of . To have a 90 average over six tests, she’ll need to get up to a sum of . That means that she needs to score a…