R1C11 = Table[Random[Real,{.999,1.001}],100] ;
R1C12 = Table[Random[Real,{.999,1.001}],100] ;
R1C13 = Table[Random[Real,{.999,1.001}],100] ;
R1C14= Table[Random[Real,{.999,1.001}],100] ;
R1C15= Table[Random[Real,{.999,1.001}],100] ;

R1C21 = Table[Random[Real,{.999,1.001}],100] ;
R1C22 = Table[Random[Real,{.999,1.001}],100] ;
R1C23= Table[Random[Real,{.999,1.001}],100] ;
R1C24 = Table[Random[Real,{.999,1.001}],100] ;
R1C25 = Table[Random[Real,{.999,1.001}],100] ;

R1C31 = Table[Random[Real,{.999,1.001}],100] ;
R1C32 = Table[Random[Real,{.999,1.001}],100] ;R1C33 = Table[Random[Real,{.999,1.001}],100] ;R1C34 = Table[Random[Real,{.999,1.001}],100] ;
R1C35 = Table[Random[Real,{.999,1.001}],100] ;

R1C41= Table[Random[Real,{.999,1.001}],100] ;R1C42 = Table[Random[Real,{.999,1.001}],100] ;R1C43 = Table[Random[Real,{.999,1.001}],100] ;R1C44 = Table[Random[Real,{.999,1.001}],100] ;
R1C45 = Table[Random[Real,{.999,1.001}],100] ;

R1C51= Table[Random[Real,{.999,1.001}],100] ;R1C52 = Table[Random[Real,{.999,1.001}],100] ;R1C53 = Table[Random[Real,{.999,1.001}],100] ;R1C54 = Table[Random[Real,{.999,1.001}],100] ;
R1C55 = Table[Random[Real,{.999,1.001}],100] ;

R1 = 1/(1/(R1C11+R1C12+R1C13+R1C14+R1C15) + 1/(R1C21+R1C22+R1C23+R1C24+R1C25) +1/(R1C31+R1C32+R1C33+R1C34+R1C35) +1/(R1C41+R1C42+R1C43+R1C44+R1C45) + 1/(R1C51+R1C52+R1C53+R1C54+R1C55)) ;

StandardDeviation[R1]

R201 = Table[Random[Real,{.999,1.001}],100];
R202 = Table[Random[Real,{.999,1.001}],100];
R203 = Table[Random[Real,{.999,1.001}],100];
R204 = Table[Random[Real,{.999,1.001}],100];
R205 = Table[Random[Real,{.999,1.001}],100];
R206 = Table[Random[Real,{.999,1.001}],100];
R207 = Table[Random[Real,{.999,1.001}],100];
R208 = Table[Random[Real,{.999,1.001}],100];
R208 = Table[Random[Real,{.999,1.001}],100];
R209 = Table[Random[Real,{.999,1.001}],100];
R210 = Table[Random[Real,{.999,1.001}],100];
R211 = Table[Random[Real,{.999,1.001}],100];
R212 = Table[Random[Real,{.999,1.001}],100];
R213 = Table[Random[Real,{.999,1.001}],100];
R214 = Table[Random[Real,{.999,1.001}],100];
R215 = Table[Random[Real,{.999,1.001}],100];
R216 = Table[Random[Real,{.999,1.001}],100];
R217 = Table[Random[Real,{.999,1.001}],100];
R218 = Table[Random[Real,{.999,1.001}],100];
R219 = Table[Random[Real,{.999,1.001}],100];
R220 = Table[Random[Real,{.999,1.001}],100];
R221 = Table[Random[Real,{.999,1.001}],100];
R222 = Table[Random[Real,{.999,1.001}],100];
R223 = Table[Random[Real,{.999,1.001}],100];
R224 = Table[Random[Real,{.999,1.001}],100];

R2 = 1/(1/R201 + 1/R202+1/R203 +1/R204 +1/R205 +1/R206 +1/R207 +1/R208 +1/R209 +1/R210 +1/R211 +1/R212 +1/R213 +1/R214 +1/R215 +1/R216 +1/R217 +1/R218 +1/R219 +1/R220 +1/R221 +1/R222 +1/R223 +1/R224 );

Mean[R2]

StandardDeviation[R2]

divider = R2/(R1 + R2) ;

Mean[divider]

StandardDeviation[divider]

Vout = Table[Random[Real,{2.4999,2.5001}],100] * divider;

Mean[Vout]

StandardDeviation[Vout]

Histogram[Vout]