User:Cook Me Plox/Barrows

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Killing Ahrim, Guthan, Karil, Torag and Verac gives a total of 6 rolls for the Barrows chest.

Each roll gives a 1/160 chance at a piece of Barrows equipment. There are 20 eligible pieces, so each is 1/3200 per roll.

Item Price Expected per chest Expected value
Ahrim's hood.png Ahrim's hood 63,875 0.187% 99.8
Ahrim's robetop.png Ahrim's robetop 2,852,446 0.187% 4,456.95
Truncated for laziness...
Guthan's warspear.png Guthan's warspear 941,404 0.187% 1,470.94
27,123

Killing an additional 200 combat levels worth of crypt monsters gives a total of 856 reward points. That makes you eligible for the following rewards:

Item Chance per roll Quantity range Price Expected per chest Expected value
Coins.png Coins 44.39% 2-760 1 1014.8 1,014.8
Mind rune.png Mind rune 14.6% 254-336 3 258.5 775.4
Chaos rune.png Chaos rune 14.6% 112-140 68 110.4 7,507
Death rune.png Death rune 14.6% 70-83 202 67 13,539.4
Blood rune.png Blood rune 11.8% 37-42 202 28 11,185.5
33,345

Therefore, the expected value of one Barrows chest in this configuration is 60,468.