From the pie chart, the percentage of students placed in Computer is 17%, and in Electrical, it is 15%. The total percentage of students from Computer and Electrical placed is:
\[
17\% + 15\% = 32\%.
\]
So, the number of students placed in Computer and Electrical is \( 32\% \) of the total number of students:
\[
\frac{32}{100} \times 300 = 96 \, \text{students}.
\]