Weight in pounds	Probablity	F(X)
20	0.05	0.05
25	0.05	0.10
30	0.05	0.15
35	0.1	0.25
40	0.15	0.40
45	0.2	0.60
50	0.15	0.75
55	0.1	0.85
60	0.05	0.90
65	0.05	0.95
70	0.05	1.00

Suppose Karan decides to pre pay for 40 pounds worth of checked bag . With what probability will he have to pay extra money for checjede luggage on the day of travel ??