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प्रश्न
If the mean of x, y, z is y, then mean of x and z is ______.
रिकाम्या जागा भरा
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उत्तर
If the mean of x, y, z is y, then mean of x and z is y.
Explanation:
The mean of x, y and z is y, so x + y + z = 3y.
Hence, x + z = 2y and the mean of x and z is `(x + z)/2 = y`.
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