78 + 79 + 80 + 80 + 81 + 81 = 479
Assuming you mean the arithmetic mean, it is 80.
There are an infinite number of sets with mean 80. Here are some: {80, 80, 80}, {80, 80, 80, 80, 80, 80} {79, 80, 81}, {79, 79, 80, 81, 81}, {79, 79, 80, 82} (1, 80, 159}, {-40, 200} To produce a set of n numbers with mean 80, start with any set of n-1 numbers. Suppose their sum is S. Then add the number 80*n-S to the set. You will now have n numbers whose sum is S+80*n-S = 80*n So the mean of this set is 80.
79 & 81, or any whole number from 1 to 79 with any whole number greater than 81.
Take I-79 NORTH to I-80 EAST to CLARION at EXIT 116A.Take I-80 EAST to I-81 NORTH to WILKES-BARRE and SCRANTON at EXIT 260B (LEFT EXIT).Take I-81 NORTH to Wilkes-Barre.You can remember the route by just thinking 79 80 81.
The variance of 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 = 16.8456
598
mn = 80 m -n = -79 Substitute m - 80/m = -79 m^2 - 80 = -79m m^2 + 79m = 80 (NB Notice change of signs) Quadratic Eq'n m = { - 79 +/- sqrt[)79)^2 - 4(1)(-80)}] / 2(1) m = { - 79 +/- sqrt[6241 + 320}]/ 2 m = { -79 +/- sqrt[6561]} / 2 m = { - 79 +/- 81}/2 m = -160 / 2 = -80 or m = 2/2 = 1 Hence n = 1 + 79 = 80
79, 80 ,81 Phyllis youngest Christine oldest Dorothy Middle
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.
81
episode 80 or 81. They break it up into 20 episode seasons. Not sure if it goes to 79 then starts with 80, or ends at 80 and starts at 81. but it shouldn't be too hard to figure out from there.