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SmokeyRN
05.05.2020 •
Mathematics
The mean of the data set is 18. What number is missing? 21, 11, __, 27, 22, 13, 16
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Ответ:
The unknown number is 16
Step-by-step explanation:
Let the missing number be x
To find the mean we add up all the numbers and divide by the number of numbers
21, 11, _x_, 27, 22, 13, 16
We know the mean is 18
(21+ 11+x +27+ 22+ 13+ 16)/7 = 18
Multiply each side by 7
(21+ 11+x +27+ 22+ 13+ 16)/7 *7 = 18*7
(21+ 11+x +27+ 22+ 13+ 16) = 126
Combine like terms
110+x = 126
Subtract 110 from each side
110+x-110 = 126-110
x = 16
Ответ:
16
Step-by-step explanation:
Sum = mean × n
Sum = 18 × 7 = 126
21 + 11 + x + 27 + 22 + 13 + 16 = 126
x = 16
Ответ:
Are you speaking enchantment table?