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20 छात्रो का औसत वजन 89.4 kg अंकीत किया गया । बाद में ज्ञात हुआ की एक मान 87 kg के स्थान पर 78, kg अंकीत किया गया । सही औसत वजन ज्ञात करे ?A. 88.95 kgB. 89.25 kgC. 89.55 kgD. 89.85 kg |
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Answer» Correct Answer - D According to the question avg. weight of a 20 boys =89.4 kg Sum of a weight of 20 boys =89.4x20=1788 kg It was later discovered that one weight was misread as 78 kg instead of 87 kg `therefore` difference =87-78=9 kg `therefore` Actual sum of a weight of 20 boys =1788+9=1797 kg Actual avg. `=1797/20=89.85 kg ` |
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