Chapter 6 - Section 6.2 - Assess Your Understanding - Applying the Concepts - Page 346: 55c

$μ_X=1.919$

$μ_X=Σ[x.P(x)]=1\times P(1)+2\times P(2)+3\times P(3)+4\times P(4)+5\times P(5)+6\times P(6)+7\times P(7)+8\times P(8)+9\times P(9)+10\times P(10)=1\times0.542+2\times0.2494+3\times0.1187+4\times0.05651+5\times0.02690+6\times0.01280+7\times 0.006094+8\times0.002901+9\times0.001381+10\times 0.0006573=1.919$