Diketahui P(x)=(x4)⋅(12)x⋅(12)4−xP\left(x\right)=\left(_x^4\right)\cdot\left(\frac{1}{2}\right)^x\cdot\left(\frac{1}{2}\right)^{4-x}P(x)=(x4)⋅(21)x⋅(21)4−x untuk x=1,2,3,4x=1,2,3,4x=1,2,3,4. Nilai P(1≤X≤2)P\left(1\le X\le2\right)P(1≤X≤2) adalah ....
18\frac{1}{8}81
38\frac{3}{8}83
58\frac{5}{8}85
78\frac{7}{8}87
111