Answer:
The raction of bones in skull and hands is [tex]\frac{7}{20}[/tex]
Step-by-step explanation:
The fraction of bones in skull and hands is obtained by adding both fractions:
[tex]\frac{1}{10} +\frac{1}{4} =\frac{2}{20} +\frac{5}{20}=\frac{7}{20}[/tex]