The roots of the quadratic equation \( 3x^2 - px + q = 0 \) are \( 10^{\text{th}} \) and \( 11^{\text{th}} \) terms of an arithmetic progression with common difference \( \dfrac{3}{2} \). If the sum of the first \( 11 \) terms of this arithmetic progression is \( 88 \), then \( q - 2p \) is equal to _________.
