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A portfolio consists of four bonds with the following characteristics:
| Bond | Market Value | Duration |
|---|---|---|
| A | $1.2 million | 3.2 |
| B | $3.4 million | 7.6 |
| C | $2.9 million | 12.4 |
| D | $1.6 million | 1.5 |
The duration of the portfolio is closest to:
A
5.4.
B
6.2.
C
7.5.