Advertisements
Advertisements
प्रश्न
There are three machines and 2 of them are faulty. They are tested one by one in a random order till both the faulty machines are identified. What is the probability that only two tests are needed to identify the faulty machines?
योग
Advertisements
उत्तर
Two tests will be required if the first machine is faulty and the second is good OR both machines are faulty.
Probability that only two tests are needed = `2/3 xx 1/2 + 2/3 xx 1/2`
= `2/3 (1/2 + 1/2)`
= `2/3 xx 1`
= `2/3`
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
