user115348: So, here is the statement: "Not every combination of words from bip39 wordlist is valid."
What are the chances of hitting a VALID mnemonic phrase out of bip39, if someone picks 12, 18 and 24 words from the word list randomly by himself?

user76567: The checksum is 1 bit for every 3 words so 1/16 for 12 words, 1/64 for 18 words and 1/256 for 24 words

115348: <p>So, here is the statement: &quot;Not every combination of words from bip39 wordlist is valid.&quot;</p>
<p>What are the chances of hitting a VALID mnemonic phrase out of bip39, if someone picks 12, 18 and 24 words from the word list randomly by himself?</p>
 76567: <p>The checksum is 1 bit for every 3 words so 1/16 for 12 words, 1/64 for 18 words and 1/256 for 24 words</p>
