In voids method of determining the quantity of cement paste, it is assumed that the -

voids in the coarse aggregate are filled by the fine aggregates

volume of fine aggregates required for 1 m³ of coarse aggregate is equal to total voids in coarse aggregate plus 10% aggregate extra to allow for additional voids created by wedging action

volume of cement paste required for 1 m³ coarse aggregate is equal to total volume of voids in the fine aggregate plus 15% aggregate extra to allow for additional voids created by wedging action

all of the above