Question

2.
12. The average age of 7
students is 14 years. What is
the total age of 7 students?
Marks​

Answer 1

Answer:

14 is the answer ok haaa

Answer 2

Answer:

The average age of a group of 5 of the students is 10 years and that of another group of 5 of them is 14 ... Total age of all student=average age* total no of student 30∗12=5∗10+5∗14+20∗x 360=50+70+20x ... Foundation Olympiad Class 9 IMO 5-Year E-book 14 ... The average marks in statistics of 30 students is 52.