47% of the students in a class of 34 students has glasses or contacts. How many students in the class have either glasses or contacts?
Pick:  A) 15  B) 16  C) 17  D) 18  E) 19
a=r⋅b   a=r⋅b   47%=0.47a   47%=0.47a   =0.47⋅34   =0.47⋅34   a=15.98≈16   Option 16 is correct.
<result>B</result>
47% of the students in a class of 34 students has glasses or contacts. How many students in the class have either glasses or contacts?