Answer:
x = 39.1
Step-by-step explanation:
Points to remember
Mean of a data set is given by
Mean = (sum of data set)/Total number of data
To find the value of x
It is given a data set
31.7, 42.8, 26.4, x
Mean = 35
Sum of data set = 31.7 + 42.8 + 26.4 + x = 100.9 + x
(100.9 + x)/4 = 35
100.9 + x = 35 * 4 = 140
x = 140 - 100.9 = 39.1
Therefore x = 39.1
