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'Time to Evolve 2' printed from https://nrich.maths.org/
What are the formulae for the expectation
of a sum and the variance of a sum?
In creating the trial simulation, you could use the spreadsheet
functions
RAND() returns a
$\mbox{U}[0,1]$ random variable.
COUNTIF($A$5:$A$1005,"=96")
counts the number of cells in the range$A$5:$A$1005 which equal the
value 96