Syntax

NEGBINOMDIST(num_failures, num_successes, prob_success)

Arguments

The printed syntax lists 3 argument(s), in order:

  • num_failures
  • num_successes
  • prob_success

“optional” marks an argument Google prints in square brackets; “repeatable” marks one Google prints with “…”.

Description from Google Docs Editors Help

“Calculates the probability of drawing a certain number of failures before a certain number of successes given a probability of success in independent trials.”

Google’s help article for NEGBINOMDIST →

Source: Google Docs Editors Help, “Google Sheets function list” (support.google.com/docs/table/25273), record record 359 of 516, data fetched 28 September 2026. Data month: September 2026.