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7, 7, 7, 9, 11, 13
To find the mean you would add up all the numbers 7+9+10+11+11+12 and get 60. Then divide by how many numbers you added by, in this case 6. So 60 ÷ 6 = 10. The mean would be: 10
The mean of the given numbers is their sum divided by the number of terms.~6.857 or 6 6/7
3, 7 and 11 are prime numbers.
To find the mean you add them all up then divide by the number of numbers so: 1+3+5+7+9+11 divided by 6 = 36/6 = 6