If probability of a defective bolt is 0.1 , then mean and standard deviation of…
Mathematics · JEE Main · NTA Exams — Statistics and Probability
If probability of a defective bolt is \(0.1\), then mean and standard deviation of distribution of bolts in a total of 400, are :
- \(\text { 30, } 3\)
- \(\text { 40,5 }\)
- \(\text { 30, } 4\)
- \(40,6\)
Answer
(D) 40,6
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