2007-02-01 03:06:40 · 7 answers · asked by Bintou S 1 in Science & Mathematics ➔ Mathematics
arithmetic mean is a fancy way of saying the average.
In order for 5 values to have an average of 8.2 their sum must be equal to 5*8.2=41. The sum of the given values = 35. therefore the fifth value equals 41-35=6.
2007-02-01 03:11:46 · answer #1 · answered by absynthian 6 · 0⤊ 0⤋
arithmetic mean is the average. to average, one adds the total value for all numbers on the board, then divides by the amount of numbers being averaged. start by multiplying by 5 to get the total of all the numbers together. 8.2*5= 41. then you can start subtracting the known numbers. 41-6-10-7-12, this equals 6.
2007-02-01 03:14:00 · answer #2 · answered by copinmi2003 1 · 0⤊ 0⤋
(6 + 10 + 7 + 12 + x)/5 = 8.2
(35 + x)/5 = 8.2
multiply by 5
35 + x = 41
x = 6
2007-02-01 03:09:29 · answer #3 · answered by Ken M 3 · 1⤊ 0⤋
What you want to do is find the total and then subtract to find the 5th value. Ok, your four given values add up to 35, and your total has to be 41. So your missing value is 6.
2007-02-01 03:14:03 · answer #4 · answered by obelix 6 · 0⤊ 0⤋
6+10+7+12=35
8.2x5=41
41-35=6
5th value=6
2007-02-01 03:27:27 · answer #5 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
their sum is
41
last vaiue is=41-6-10-7-12
=6
2007-02-01 03:18:24 · answer #6 · answered by well thts it...... 3 · 0⤊ 0⤋
5*8.2 = 41
6+10+7+12=35
41-35=6
and there you have it
2007-02-01 03:09:00 · answer #7 · answered by Michael Dino C 4 · 0⤊ 0⤋