About 4 out of 5 students are left handed. If there are totally 40 students in an class. How many would be left handed ?
A) 40
B) 45
C) 32
D) 30
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answer is 32 for the question
4:5::x:40
5x=160
x=32
4:5::x:40
5x=160
x=32
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