6 + 12 = 18
18 + 24 = 42
Double the difference between every 2 numbers (12 x 2 = 24 x 2 = 8)
42 + 48 = 90
90 is the missing number
Happy to Help!
Answer:
Mean = 24
Variance = 107.78
Standard deviation = 10.38
Hope this helps! :)
6.5 is the mean of the data
