The mean of the data set of 1000 items is 5. From each item 3 is subtracted and then each number is multiplied by 2. The new mean will be-
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Job Solution Bangladesh Bank বাংলাদেশ ব্যাংক অফিসার ০২ -১২-২০২২ গণিত
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Sum of 1000 items = 1000×5=5000

[5000-(1000×3)]×2=4000

Mean= 4000÷1000=4

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The answer is =(5 - 3) × 2=4

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