sir, how it is done

= 0.46575 8. A Iherzolite xenolith from the mantle contains 40 volume % olivine, 25 volume % orthopyroxene and 35 volume % clinopyroxene. If the densities of the minerals are (in g/cc) olivine = 3.65, orthopyrOxene = 3.11 and clinopyroxene = 3.59, the bulk density of the xenoliths in g/cc