Two life insurance policies, each with a death benefit of 10,000 and one time premium of 500, are sold to a couple, one for each person. The policies will expire at the end of the tenth year. The probability that only the wife will survive at least ten years is 0.01, and the probability that both of them will survive at least ten years is 0.96.

What is the probability that the husband will survive at least 10 years, given that his wife has survived at least 10 years?