17. water use the old farmer's almanac reports that the
average person uses 123 gallons of water daily. if the
standard deviation is 21 gallons, find the probability that|
the mean of a randomly selected sample of 15 people
will be between 120 and 126 gallons. assume the
variable is normally distributed.

b. the decimal could be two-tenths.

step-by-step explanation:

use google you idiot omg you're so annoying

step-by-step explanation:

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