In a bolt factory, machines A, B, C manufacture respectively 25%, 35% and 40% of the total production. Of their output 5%, 4% and 2% respectively are defective bolts. A bolt is drawn at random and is found to be defective. What is the probability that it is manufactured by machine B ?
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1. Nirma University Engineering College 2. IIT gandhinagar 3. SVNIT surat 4. BVM vidya nagar 5. DDIT nadiad 6. LD Engineering college Ahmedabad 7. Ganpan vidyanagar
"MS64" is short for "Mint State 64" and would refer to an uncirculated coin in very good, but not perfect, condition. MS70 would be a "perfect" coin, and MS60 would be the lowest uncirculated coin - no wear, but a lot of dings and probably not a great strike. If you're interested, "Good" is usually about MS4, "Very Good" MS8, "Fine" MS12 to MS15, "Very Fine" MS25 to MS30, "Extremely Fine" MS40 to MS45, and "Almost Uncirculated" MS50 to MS58 (usually MS52, MS55 or MS58).