A baseball team sells tickets for two games. The ratio of sold tickets to unsold tickets for the first game was 7:3. For the second game the ratio was 13:2. There were 240 unsold tickets for the second game. How many tickets we sold the first game.

what's that

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