① 閑1庄0.95刷什麼能虧0.025
0.95×0.95+1/25×0.95×1%×95%
= 0.95×0.95+1/25×0.95×1%×0.95
= 0.95×0.95(1+1/25×1%)
= 0.9025×(1+1/2500)
= 0.9025+0.9025/2500
= 0.9025+0.0×4
= 0.9025+0.0
= 0.9025