In a stingy effort to maximize my gold income, I was trying to figure out if it was worth it to reroll daily quests that award 50 gold, from a mathematical point of view only (meaning I don't care how long it takes to complete and that it's my only active quest).
I did some research/calculations on my side, here are my results
There are 78 unique quests available *quests of the 'win X games with class Y or z' type have 9 possibilities each, per Hearthstone wiki) Those quests award a total of 4000 gold Therefore, the expected amount is 51.28 gold Conclusion: I should reroll a 50 gold quest
to get the above result, I gave a value of 100 gold to the Watch and Learn! quest. I also ignored the fact that the Everybody! Get in here! quest can only be completed 5 days out of 7 and that the Play a Friend! quest can only reappear 5 days after appearing once
Does that make sense? Did I mess something up in the calculations or the reasoning?