83
To find the average, add the scores and divide the sum by how many scores you are adding: 81 + 76 + 91 + 73 + 79 = 400 ÷ 5 = 80.
82
The answer is 81. Simply add the three test scores and divide by three.
(81 + 77 + 83 + 75 + X) divided by 5 = 80 average 316 + X = 400 X = 84
84
To find the number needed to achieve a mean of 84 with the existing scores of 79, 86, 81, 80, and 89, first calculate the current total of the scores, which is 415. Since there are 5 scores, let ( x ) be the score needed to reach the desired mean with 6 scores. The equation is ((415 + x)/6 = 84). Solving this gives ( 415 + x = 504), so ( x = 504 - 415 = 89). Thus, you would need a score of 89.
The LCM is 2268.
81 and 84 both go into 6804. The LCM is 2268.
3x-84 = -81
group
He was 84
81 84 87