The average weight of a group of 30 friends increases by 1 kg when the weight of their football coach is added. If the average weight of the group after including the weight of the football coach is 31 kg, Find the weight of their football coach .
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Answer:
the weight of the football coach is 91kg
Step-by-step explanation:
average weight not including football coach =30+3=90 kg
average weight including football coach = 31×31=91 kg
therefore weight of coach = 991-900=91 kg
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