"To calculate the number of hands spoiled at the outset because a Heart 10-J-Q-K or A comes up, that's 5 cards you have to dodge out of 52, or about 10% of the deck (rounded)"
Its late here and I am going to sleep but I did not figure that.
You have to dodge 5/52 (approx) in each position. You are only allowing for each one in all positions.Maybe not as long as I said but still good comps.