A.0.1587+0.5 B.1-0.1587 C.0.1587×2 D.1-0.1587×2
A.n較大且π接近0 B.n較大且π接近1 C.n較大且π接近0或1 D.n較大且π接近0.5
A.95% B.45% C.97.5% D.47.5%