I know the answer can some one explain it for me plz thanks

I know the answer can some one explain it for me plz.. thanks in advance..

7. The proportion of values strictly less than 10 is I know the answer can some one explain it for me plz.. thanks in advance..

Solution

Frequency of observations less than 10= 2+3+4= 9

Total number of observations= 2+3+4+6+8+2+1= 26

Thus, required proportion is 9/26= 34.61%