Question 808452
 If the mean of 8 scores is 5 and 1 score is added which changes the mean to 7 then what was the score that was added
:
Let x = the score that was added, now there are 9 scores
{{{(8(5)+x)/9}}}= 7
multiply both sides by 9
40 + x = 63
x = 63-40
x = 23