Which of the following sentences is punctuated correctly?
a
All thirty two nine year old students carried twenty pound backpacks.
b
All thirty-two nine year old students carried twenty-pound backpacks.
c
All thirty two nine-year-old students carried twenty-pound-backpacks
d
All thirty-two nine-year-old students carried twenty-pound backpacks.
The correct sentence is:
d
All thirty-two nine-year-old students carried twenty-pound backpacks.
The correct sentence is:
d
All thirty-two nine-year-old students carried twenty-pound backpacks.