2 quick ones

[eddiefrom]

anyone know the odds against getting either a flush or a straight by the river when holding suited connectors 4-5 through T-J?

Also. ... two different people recently said to me that the odds of going runner, runner flush (backdoor flush) were 15:1. I make it 23:1. Right? Anyone have any idea of where that 15:1 number might come from?

[Sloth]

the backdoor flush is 10/47 * 9/46 is 4.16% or 1 in 24 or 23 to 1.