Mathematics 1
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In audition for school play, 70% passed the quality of the jurors for the first week. of those remaining, 20% were chosen. if only 7 were qualified, how many tried their luck?

0.2Sr = 7
Sr = 35 Students remaining.
0.3S = 35
S = 35 / 0.3 = 116.7 or 116 Students
tried their luck.