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The mean and standard deviation of 100 items are 50,5 and that of 150 items are 40,6 respectively.What is the combined mean of all 250 items ?a)43b)44c)45d)46Correct answer is option 'B'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about The mean and standard deviation of 100 items are 50,5 and that of 150 items are 40,6 respectively.What is the combined mean of all 250 items ?a)43b)44c)45d)46Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The mean and standard deviation of 100 items are 50,5 and that of 150 items are 40,6 respectively.What is the combined mean of all 250 items ?a)43b)44c)45d)46Correct answer is option 'B'. Can you explain this answer?.

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