Mr. Ellis is a teacher who tutors students after school. Of the students he
tutors, 30% need help in computer science and the rest need assistance in math.
Of the students who need help in computer science, 40% are enrolled in Mr.
Ellis’s class during the school day. Of the students who need help in math, 25%
are enrolled in his class during the school day. What percent of the
after-school students are enrolled in Mr. Ellis’s classes?

step-by-step explan mxfcg'k; uafwgzfgjhklhgation:

answer:

c. the third graph

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b