A box contains seven bulbs out of which 5 are defective

A box contains seven bulbs out of which 5 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good.

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #29378