• # question_answer In a box containing $100$ bulbs, $10\,$ are faulty. The probability that from a sample of $5$ bulbs none are defective. A) ${{\left( \frac{1}{10} \right)}^{5}}$                        B) ${{\left( \frac{9}{10} \right)}^{5}}$C) $\frac{9}{{{10}^{5}}}$                                 D) $\frac{1}{5}$

$p=\frac{1}{10}\,\,\,\,q=\frac{9}{10}$ $\therefore$Probability that none are defective$={{\left( \frac{9}{10} \right)}^{5}}$