Cement ratio? for patio what ratio cement +sand+gravel

for patio what ratio cement +sand+gravel
Answers:    A properly designed concrete mixture will possess the desired workability for the fresh concrete and the required durability and strength for the hardened concrete. Typically, a mix is in the order of 10 to 15 percent cement, 60 to 75 percent aggregate and 15 to 20 percent water. Entrained nouns in lots concrete mixes may also take up another 5 to 8 percent.
I use a 5 to one ratio (five parts gravel, one portion cement)

the gravel is 60/40 (I assume that is 60 percent sand, 40 % rocks)

The moisture content of gravel vary, so difficult to give amount of hose.