Question

In a computer lab there are 3 computers for every 6 students. How many computers will be needed for 42 students?

Answer 1

• Since 6 students needed 3 computers.

      So      1   ''       ''          ''         1/2    ''    ''

     ''     42    ''       ''            ''      1/2 x 42 = 21 computers.

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Answer 2

for
6students-3computers
42students-?(x)
6x=3x42
6x=126
X=126/6
x=21computers