A drawer contains 50 bolts and 150 nuts.half of bolts and half of nuts are rusted.if one is chosen at random,what is the probability of that is rusted or bolt.
Question asked by: mathana18
Asked on: 08 Sep 2009
50 bolts and 150 nuts
25 rusted bolts, 75 rusted nuts
Therefore chance that when pick one it is a bolt is: 50/200 or 1/4
Chance that what you take out is rusted is 100/200 or 1/2
By: knowitall
Average rating for this answer is 2.5 / 5
Rate Answer
Comment or provide your answer to this question
Comments and other answers:
P(rust) = 100/200 = 1/2
p(bolt) = 50/200 = 1/4
p(rust or bolt) = p(rust) + p(bolt) - p(rust and bolt) = 1/2 + 1/4 - 25/200 = 5/8
answer is 5/8
By: don123
Date of comment: Sat, Nov 27th 2010
By: don123
Date of comment: Sat, Nov 27th 2010
Ask a New Question
Find out more about Maths
Find out more about Maths
Maths Questions and Answers
probability Questions and Answers
Next question: Maths sequence
Become a Member! It's Free >>>
Share on Facebook: 
On Twitter:
Tweet this!
Question Keywords
rusted nuts bolts random probability bolt contains
More Questions:In A Factory Of 600 People, The Ratio Of Male Workers To Female Workers Is 3:2.how Many Workers Are Female?really Need Help
Complete The Sequence
Limit Of Function
Write 5 Rational Numbers Between 2 And 3
Find The Number Of Big Boxes Sold