The average height of a group of 9 students is 168 cm. Two more students of height 174 cm and 184 cm join the group.
What is the new average (in cm)?
1
167
2
172
3
165
4
170
The average height of a group of 9 students is 168 cm. Two more students of height 174 cm and 184 cm join the group.
What is the new average (in cm)?