as likely as not
US /æz ˈlaɪkli æz nɑːt/
UK /æz ˈlaɪkli æz nɑːt/

1.
kemungkinan besar, sangat mungkin
very probable; almost certain
:
•
As likely as not, he'll be late again.
Kemungkinan besar, dia akan terlambat lagi.
•
She'll as likely as not forget about the meeting.
Dia kemungkinan besar akan melupakan rapat itu.