Question

Average weight of 5student is42.2 and average weight of 4student is 35.5 the average if all students

Answer 1

• average of 5 student = 42.2

• total weight of students = 42.2×5

= 211

• average weight of 4 students= 35.5

• total weight of 4 students= 35.5×4

= 142

• total weight of all students= 142+211÷4+5

= 353÷9

= 39.2