dumb luck

Translations
слепая удача
He got the job through dumb luck.
Он получил работу благодаря слепой удаче.
Definitions
Dumb luck refers to a fortunate outcome that occurs by chance rather than through skill, planning, or intelligence. It implies that the success or good fortune is accidental and not a result of one's efforts or abilities.
Words
luck

noun
удача
dumb

adjective
немой