322-323 / 2063
S
=
1
−
1
−
e
−
D D
0
(
)
n
P
(0 hits on a target) =
e
-D/D0
P
(≥1 hit on a target) = 1 –
e
-D/D0
P
(≥1 hit on
n
targets) = (1 –
e
-D/D0
)
n
P
(not
all
targets hit) = 1 – (1 –
e
-D/D0
)
n
D
q
=
D
0
log
e
n
5.4 = 1.6 × 3.4