Three genes x, y, and z are located on a chromosome in a linear order. If the recombination frequencies between x and y is 0.15, and between y and z is 0.10, then the expected frequency of double crossovers is _________

List-I	List-II
A. Metacentric chromosome	I. Chromosome has a terminal centromere
B. Sub-metacentric chromosome	II. Middle centromere forming two equal arms of chromosome
C. Acrocentric chromosome	III. Centromere is slightly away from the middle of chromosome resulting into two unequal arms
D. Telocentric chromosome	IV. Centromere is situated close to its end forming one extremely short and one very long arm

List-I	List-II
A. Histones	III. Positively charged basic proteins
B. Nucleosome	IV. DNA wrapped around histone octamer
C. Euchromatin	I. Loosely packed chromatin
D. Heterochromatin	II. Densely packed Chromatin

Three genes x, y, and z are located on a chromosome in a linear order. If the recombination frequencies between x and y is 0.15, and between y and z is 0.10, then the expected frequency of double crossovers is __________(rounded off to three decimal places).