the table shows the percentage of users of a data tablet who returned the product to an internet provider within a year after purchase, after a year, and the reasons for the return.

battery life monthly service fee new version totals
within a year 5% 25% 60% 90%
after a year 1% 3% 6% 10%
totals 6% 28% 66% 100%
find the probability of a user returning the tablet within a year, given that a new version of the tablet was introduced.