## Statistics (12th Edition)

$P(20.5 \leq x \leq 25.5) = ∫_{20.5}^{25.5} f(x).dx$ = $∫_{20.5}^{25.5} \frac{1}{d-c}.dx$ = $∫_{20.5}^{25.5} \frac{1}{20}.dx$ = 1/20 (25.5-20.5) = 5/20 = 0.25