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प्रश्न
The mean of the observations 425, 430, 435, ..., 495 is ______.
रिकाम्या जागा भरा
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उत्तर
The mean of the observations 425, 430, 435, ..., 495 is 460.
Explanation:
These observations form an arithmetic sequence, so their mean is the average of the first and last terms: `(425 + 495)/2 = 460`.
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