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9/The mean weight of 10 students in a class is 50 kg. When the weight of the teacher is added. the mean weight goes up by 1 kg. Find the weight of the teach |
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Answer» 61 kg Step-by-step EXPLANATION: Original mean WEIGHT= 50 now, it became= 51 the original no. of ppl considered earlier= 10 now= 11 sum of weight of class(now)= 51*11= 561 sum of weight of class earlier = 50*10=500 only TEACHER's weight was added later so teacher's weight= 561 - 500 = 61 kg |
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