Wearing glasses

a) The table gives information about the number of female and male students who wear glasses.
 
  i) How many females do not wear glasses? __________
 
ii) Altogether, how many students wear glasses? __________
 
iii) Altogether, how many students are there? __________
 
b) Using the information on the number of right- and left-handed students, fill in the table below.
 
Males
  • 16 are right-handed
  • 5 are left-handed
 
Females
  • 12 are right-handed
  • 4 are left-handed
  Females Males
left-handed    
right-handed