About 1 in every 56000 guards killed
see the link too see what monster drop what clues. Level 21 guards are the lowest level NPC to drop them. For higher levelled players, Level 83 Cockroach soldiers found in the Stronghold of Player Safety can also be slain for level 2 Clue scrolls. A monster found to have a fairly high drop rate of these scrolls is the pyrefiend. i have also found that dagannoths under the lighthouse which requires completion of horror from the deep drop a clue very frequently
Yes, pickpocketing H.A.M guards is a popular way to get easy clue scrolls. They have a great drop rate for easy clue scrolls and involve no combat but can be frustrating due to the fail rates and being kicked out of their base. If you are a higher level I'd recommend you just fight higher level monsters and get medium or hard clue scrolls as they give better rewards.
there is no fixed rate of drops for clue scrolls but it can range from your 2nd kill to your 1,000th kill
10%
If i would be u, i would try Drum Bunnies
about 1/300 is the drop rate of hilts
don't drop out
i have no clue
i have no clue
the drop out rate is 45%i knoe cause my teacher ms. wolski told me.. clasz of 010
About 80% of candidates drop out of BUD/S.
The national percentage of high school drop outs is 8.1 percent. Females have a 7 percent drop-out rate and males a 9.1 percent drop-out rate.