Which of the following is closest to the sample standard deviation of the data set show below? 13,14,17,22,26,30,31

4th option is correct xy=-10

if this was to u plzz mark me the brainliest

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

i got 10.28 but that rounds up to 10.3

a) 7x=7

step-by-step explanation: