Question

a) \( 4 / 5 \) 30. Three electric lamps are fitted in a room. 3 bulbs are chosen at random from 20 bulbs having 16 y bulbs. The probability that the room is lighted is: \( \begin{array} { l l l l } { 282 } & { \text { b) } \frac { 283 } { 285 } } & { \text { c) } \frac { 284 } { 285 } } & { \text { d) } \frac { 281 } { 285 } } \end{array} \) a) \( \overline { 285 } \) b) \( \frac { 1 } { 285 } \) c) \( \frac { 284 } { 285 } \) d) \( \frac { 1 } { 28 } \)

Answer 1