8. Four mark exercise problems II

The mean height of $11$ students in a group is $150 \ cm$. The heights of the students are $154 \ cm$, $145 \ cm$, $Y \ cm$, $Y + 4 \ cm$, $160 \ cm$, $151 \ cm$, $149 \ cm$, $149 \ cm$, $150 \ cm$, $144 \ cm$, and $140 \ cm$. Find the value of $Y$ and the heights of the two students?

 

 

Value of $Y =$ $cm$

 

Heights of two students $=$ 142 cm, 146 cm152 cm, 156 cm150 cm, 154 cm