[tex]15 \sqrt{ \frac{3}{5} } - 0.5 \sqrt{60} + 2 \sqrt{3\frac{3}{4} } = \sqrt{ {15}^{2} \times \frac{3}{5} } - \sqrt{ {0.5}^{2} \times 60} + \sqrt{ {2}^{2} \times \frac{15}{4} } = \sqrt{225 \times \frac{3}{5} } - \sqrt{0.25 \times 60} + \sqrt{4 \times \frac{15}{4} } = \sqrt{135} - \sqrt{15} + \sqrt{15} = \sqrt{135} = 3 \sqrt{15} [/tex]

Ответ:D)