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Question Number 175011 by MathsFan last updated on 16/Aug/22

$$\mathrm{A}\mathrm{large}\mathrm{lot}\mathrm{of}\mathrm{tires}\mathrm{contain}5\mathrm{\%}\mathrm{defectives}.$$$$4\mathrm{tires}\mathrm{are}\mathrm{to}\mathrm{be}\mathrm{chosen}\mathrm{for}\mathrm{a}\mathrm{car}.\mathrm{Find}$$$$\mathrm{the}\mathrm{probability}\mathrm{that}\mathrm{you}\mathrm{find}$$$$\left(\mathrm{a}\right)2\mathrm{defective}\mathrm{tires}\mathrm{before}4\mathrm{good}\mathrm{ones}$$$$\left(\mathrm{b}\right)\mathrm{at}\mathrm{most}2\mathrm{defective}\mathrm{tires}\mathrm{before}4\mathrm{good}\mathrm{ones}.$$

Commented by mr W last updated on 16/Aug/22

$$youchoose4tires.whatdoyoumean$$$$with‘‘2defectivetiresbefore4good$$$${ones}^{″}?$$

Commented by MathsFan last updated on 16/Aug/22

$$ok$$

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