2/5 in decimal form is 0.4.
Hope this helps!
Answer:
Column 1(X) Column 2(mean - X)
125 -13
137 -1
138 0
145 7
145 7
Mean = 138
Mean Absolute Deviation : 5.6
1 in 14 or 1/14
this is the formula I used to calculate:
Probability = Favorable cases / Possible cases
Here is the answer I hope it helps
