We first find the combined mean and combined standard deviation.
The combined expected mean return of the two funds is given by:

$\mu = \frac{40}{100} \times 4\% + \frac{60}{100} \times 9\% = 7\%$

The combined standard deviation of the two funds is given by:

$\sigma = \sqrt{0.4^2 \times 0.08^2 + 0.6^2 \times 0.20^2} = 0.1242 = 12.42\%$

The z-statistic is

$Z = \frac{30\% - 7\%}{12.42\%} = 1.85$

Therefore,

$P(Z > 1.85) = 1 - 0.9678 = 0.0322$