In a class, 30% of the students are male and 70% female. among male students, 40% wears eye glasses; among female students, 30% wear eye glasses. if we select a student from the class at random, what is the probability that the student wears eye glasses?

33%.

Step-by-step explanation:

Suppose there are 100 students in the class.

Number of males wearing glasses = 30 * 0.40 = 12.

Number of  females wearing glasses = 70 * 0.30 = 21.

Required probability = (12 + 21) / 100

= 33/ 100

= 33%.

idk

step-by-step explanation:

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: