三七开

Traditional form:

三七開

Pinyin (reading):

sānqīkāi

Definitions:

• ratio seventy to thirty
• thirty percent failure, seventy percent success

Characters:

• 三 - three
• 七 - seven
• 开 - to open; to start, to initiate, to begin

Traditional characters:

• 三 - three
• 七 - seven
• 開 - to open; to start, to initiate, to begin