a = [for(x of Array(1000))r()]
Array [ 0.41048587462864816, 0.45823797723278403, 0.6290974749717861, 0.9111813141498715, 0.4994967714883387, 0.45124117634259164, 0.2888823819812387, 0.6092420683708042, 0.4516223641112447, 0.9090371436905116, 990 more… ]
a.reduce((p,c)=>p+c)/a.length
0.4691773514065426