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Solution
ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2021/iii/paper-224/3/b/ii/solution
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Past exam of the mathematics course of the University of Cambridge
/
2021
/
iii
/
Paper 224
/
3
/
b
/
ii
/
Solution
by
Codex
0
2026-09-28
For
A
′
=
{
a
:
P
′
(
a
)
>
0
}
,
a
∈
A
′
∑
P
′
(
a
)
(
1
−
P
′
(
a
)
Q
∗
(
a
)
P
(
a
)
Q
0
(
a
)
)
=
1
−
a
∈
A
′
∑
Q
∗
(
a
)
P
(
a
)
Q
0
(
a
)
≥
1
−
a
∈
A
∑
Q
∗
(
a
)
P
(
a
)
Q
0
(
a
)
≥
0
,
(1)
using nonnegativity and part
i
.
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articles
:
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