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प्रश्न
If the average of a, b, c, d is the average of b and c, then the value of a − b − c + d is ______.
रिकाम्या जागा भरा
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उत्तर
If the average of a, b, c, d is the average of b and c, then the value of a − b − c + d is 0.
Explanation:
Equating the averages gives \[\frac{a+b+c+d}{4}=\frac{b+c}{2}\], so \[a+d=b+c\].
Therefore, \[a-b-c+d=0\].
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