The average age of 15 student in a primary school is 12 year the average of 16 student is 15 year and that of 18 student is 14 years find the average age of all student
Answers
Answered by
0
Answer:
{(X/15=12)+(X/16=15)+(X/18=14)} / (15+16+18)
= (180+240+252) / (15+16+18)
= 672/49
=13.71
Similar questions