The average weight of 50 people is 40 kg. If one person leaves the group and the average decreases by one, what is the weight of the person who left?
A79 kg
B59 kg
C49 kg
D89 kg
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A, B എന്നിവയുടെ ശരാശരി 25 ഉം, B, C എന്നിവയുടെ ശരാശരി 15 ഉം ആണ്. C എന്നത് B യുടെ പകുതിയായാൽ A യുടെ വില .................... ആണ്.