What're you're looking for is called rolled throughput yield; not to go too engineer on everyone but the principle is that you multiply the probability of a successful outcome at each process step by each subsequent process step's probability of success. The more steps you have, the more difficult it becomes to get the outcome you're looking for.
For instance with the OPs probability of drops lets say I wanted a legendary chest piece for my class, a Titan; my chance of success is 1/300 X 15/100 X 5/8 X 1/5 X 1/3 = .00208% for this outcome to occur. I can then take 1 over this number to determine how many kills I [i]may[/i] need to make for this outcome to happen, roughly right and with some rounding it's 48000.
Seems like a ton to me, I'd rather spend my time getting rep and using marks to buy a guaranteed legendary, but that's just me.
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Great analysis.
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You just came to a conclusion based on completely fictitious numbers. Congrats.
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Just showing how the math works with the OPs train of thought, never once did I say [i]"destiny loot drops work exactly like this!"[/i] I'm sure there's any combination of ways that bungie organizes the loot, I'm sure it's not a simple /roll RNG. Never said I was right
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thats exactly what i was looking for haha
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Happy to help! Cheers!