Question

Average weight of 10 children in a group was 42.5 kg. Two children of weight 56 kg and 45 kg
left the group. What would be the new average weight of that group ?​

Answer 1

Step-by-step explanation:

$\mathfrak\red{answer} \\ \bf\bold\purple{sum \: of \: weight \: of \: 10 \: students = } \\ \bf\bold\purple{42.5 \times 10 = 425} \\ \bf\bold\green{weight \: of \: children \: who \: left} \\ \bf\bold\green{56 + 45 = 101kg} \\ \bf\bold\purple{weight \: of \: rest \: 8 \: students} \\ \bf\bold\purple{425 - 101 = 324} \\ \bf\bold\purple{average = \cancel\dfrac{324^{40.5} }{8} } \\ \sf\bold\red{new \: average = 40.5kg}$