Use of the internet for shopping is increasing dramatically, but still is somewhat age dependent. When a popular web site that sells books asked the age of users who bought products from them over the internet, they obtained the following data. What is the probability that a buyer on this web site is aged 60 minus 69 question mark Round to the nearest hundredth of a percent.
Age Group
10-19
20-29
30-39
40-49
50-59
60-69
70-79
Number
1969
3882
2987
802
499
233
141
answers: A.
4.81%
B.
2.27%
C.
4.75%
D.
2.22%