[Macquarie]

5/10 rule is that you should call a raise with speculative hands if the price is less that 5% of your opponents stack (or your stack if you do not cover). You should fold if price is greater than 10%.

In this case, the price is almost exactly 10% of what we stand to win if we stack the opponent. This is a special case though - we are not trying to spike a set against a raiser who might have a mediocre hand and so might not pay us off when we hit; we can be unusually confident here that we will get paid off.

In fact, we need only 7:1 for a set, and if we stack villain we are getting 10:1, so we actually only need to stack villain two times of each three we hit a set to make the call +EV. Sounds likely.