Fiona interviewed her 30 classmates on whether or not they have siblings and if they have assigned chores at home. she display her results in the table shown. which statement is true?

a) more than half of her classmates are only children

b) half of her classmates have a sibling and half do not

c) more only children did not have chores than those with a sibling

d) fewer classmate have chores than don't have chores

B)Half of her classmates have a sibling, and half do not.

Step-by-step explanation:

Add totals for classmates who have chores and those who do not have chores for each group.

7 + 8 = 15

9 + 6 = 15

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