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A comment on My Startup Job Interview. Parent comment
E(number_of_rabbits) = rabbits_in_last_turn - prob(land on rabbit) - sum_i_to_infinity(prob(land_on_blackhole)^i*prob(land on rabbit))
E(number_of_rabbits) = rabbits_in_last_turn - prob(land on rabbit) - sum_i_to_infinity(prob(land_on_blackhole)^i*prob(land on rabbit))