A music streaming service surveyed its premium subscribers and standard subscribers about their favorite music genre. The number of standard subscribers was 4 times the number of premium subscribers. The table below shows the distribution of preferred genres, in percent, for each subscriber type.
| Premium Subscribers | Standard Subscribers | |
|---|---|---|
| Pop | 70% | 30% |
| Rock | 15% | 40% |
| Hip Hop | 10% | 20% |
| Classical | 5% | 10% |
| Total | 100% | 100% |
If a randomly selected subscriber did not prefer Pop music, what is the probability that the subscriber is a premium subscriber?
