To calculate the insurance premium for a 42-year-old nonsmoking female who wants $125,000 in coverage, we first need to determine the monthly premium for every $25,000 of coverage:
From the table, the premium for a nonsmoking female aged 41 to 50 is $6.75 for every $25,000 of coverage.
Now, we calculate how many $25,000 increments are in $125,000:
\[ \frac{125,000}{25,000} = 5 \]
Next, we multiply the monthly premium by the number of increments:
\[ 6.75 \times 5 = 33.75 \]
Therefore, the insurance premium for a 42-year-old nonsmoking female who wants $125,000 in coverage is $33.75.