"A drawer contains 50 bolts and 150 nuts. Half of   the bolts and half of the nuts are
Channel: Doubtnut
Date: 2020-07-12

"A drawer contains 50 bolts and 150 nuts. Half of
 
  the bolts and half of the nuts are rusted. If one item is chosen at random,
 
  what is the probability that it is rusted or a bolt?"