5. A population is divided into three strata $A, B, C$ with individual numbers in the ratio $5:3:2$. If stratified sampling is used to draw a sample of size 100, then the number of individuals to be drawn from $C$ is $\_\_\_\_$.
(5 points) For a hyperbola with center at the origin and foci on the $x$-axis, one of its asymptotes passes through the point $(4,2)$. Then its eccentricity is
5. A population is divided into three strata $A, B, C$ with individual numbers in the ratio $5:3:2$. If stratified sampling is used to draw a sample of size 100, then the number of individuals to be drawn from $C$ is $\_\_\_\_$.\\