There are 50 bolts and 80 nuts 10% of nuts and 20% of bolts are rusted. Find the probability of not getting rusted nut.

72/130
 
  • -6

=(No.of both rusty and non-rusty bolts + non-rusty nuts) / Total no. of  nuts and bolts

=50+72/130

=61/65

  • 3
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