Question

average weight of 30 person decrease by 1kg if new girl is included in place of 55kg person. calculate the weight of girl​

Answer 1

let n be the weight of the remaining 29 people and x be the weight of girl

according to question,

(n + 55)/30 = 1+(n+x)/30

55/30=1+x/30

x=25 kg

hence, weight of girl is 25kg