Specific gravity and absorption lab tests were run on two coarse aggregate samples to be blended. The test results are as follows:

Aggregate A: Bulk specific Gravity $=2\mathrm{.}491$; Absorption $=0\mathrm{.}8\%$

Aggregate B: Bulk specific Gravity $=2\mathrm{.}773$; Absorption $=4\mathrm{.}6\%$

What is the specific gravity of a mixture of $60\%$ aggregate A and $40\%$ aggregate B by weight?

a$.2\mathrm{.}491$

b$.2\mathrm{.}773$

c$.2\mathrm{.}597$

d$.2\mathrm{.}32$