If a fair coin is tossed 4 times, what is the probability, to the nearest thousandth, of getting exactly 1 heads?

Step 1 ：\( P(\text{exactly 1 head}) = \dbinom{4}{1} \cdot (0.5)^1 \cdot (0.5)^3 \)

Step 2 ：\( = 4 \cdot 0.5 \cdot 0.125 \)

Step 3 ：\( = 0.250 \)