Question

The average weight of a group of 18 students is 45 kg. A new student who weighs 64 kg joins the group.
What is the new average weight of this group. in kg?​

Answer 1

Answer:

46kg

Step-by-step explanation:

let total number of weight of 18 students = x

average weight = x/18=45

=. x=810

therefore total weight of 18 student is 810kg

now,

adding 64 we get 874 kg total weight

so, average weight of 19 student is 874/19=46kg