Red caps are 1 more than blue caps.<br>Total = 11 caps = Blue + Red = Blue + Blue + 1.<br><br>&bull; 11 - 1 = 10 (twice the number of blue caps)<br>&bull; 10 &divide; 2 = 5 (blue caps)<br><br>Check: Blue = 5, Red = 5 + 1 = 6, Total = 5 + 6 = 11. &#10003;<br><br>Final Answer: 5