Just solve number 5 from the table

Determine the density of a mixture consisting of x - amount of petroleum product A with a relative density of d(A),y - amount of petroleum product B with a relative density of d(B),z - amount of petroleum product C with a relative density of d(C) etc. (Mixture can contain different quantities components). (See Table 1.5 for the individual assignment) Table 1.5 Individual assignment to task 1.3