1. **State the problem:** Lois has 50 units of money and gives 3/10 of it to charity. We need to find how much she gives to charity. 2. **Formula used:** To find a fraction of a quantity, multiply the total amount by the fraction. 3. **Calculation:** $$\text{Amount given to charity} = 50 \times \frac{3}{10}$$ 4. **Simplify:** $$50 \times \frac{3}{10} = \frac{50 \times 3}{10} = \frac{150}{10} = 15$$ 5. **Answer:** Lois gives 15 units of money to charity. This means she donates 15 out of her 50 units to charity.