One adult and 10 children are in an elevator.?


teacher's weight 4*y/10
total weight 4*y/10 +y (since y toal weight of children , 4* y/10 total weight of teacher)

total weight 14y/10

if don't know how break down fractions (4y/10) / (14y/10). 10 cancel out each other , y cancel out each other leave 4/14 can broken down further 2/7 (this answer)

one adult , 10 children in elevator. if adult's weight 4 times average (arithmetic mean) weight of children, adult's weight fraction of total weight of 11 people in elevator?


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