Hi Can anyone help to provide a step wise explanation? Tks.

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primary 6 Maths Singapore

Hi Can anyone help to provide a step wise explanation? Tks.

Date Posted: 4 years ago

Let original total number of students be N,

71N - 4(68) = 73 (N-4)
71N - 272 = 73N - 292
71N = 73N - 20
2N = 20
N = 10

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Date Posted: 4 years ago