1.

1). \(\frac{1}{7}\)2). \(\frac{{286}}{{328}}\)3). \(\frac{{21}}{{164}}\)4). \(\frac{7}{8}\)

Answer»

Number of not DEFECTIVE protractors = 164 - 21 = 143

Total number of protractors = 164

PROBABILITY that RUHI BUYS the protractor = $(\frac{{143}}{{164}} = \frac{{286}}{{328}})$



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