Hashing_And_Probability [closed]

Question

Consider a hash table with 9 slots that use collision-resolution with chaining and the table is initially empty. What is the probability that after 4 insertions, at least a chain of size 3 is created?

Comments

$\frac{1}{81}$?

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https://gateoverflow.in/13601/consider-hash-table-with-slots-chaining-collision-resolution

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Ayush Upadhyaya

good question.