Question

the mean weight of 90 boys and 40 girls is 65 kg and 48 kg respectively find the mean weight of all the students

Answer 1

Answer:

56.5kg

Step-by-step explanation:

mean weight = 65kg and 48kg

Mean weight = sum of mean weight/ no. of mean weight

Mean weight =( 65+48)kg/2=113kg/2

Mean weight= 56.5kg