To find the probability of choosing a senior student, we have to divide the total number of seniors by the total number of students.
According to the problem, there are 102 seniors. Let's sum to find the total number of students.
[tex]165+145+114+102=526[/tex]Then, we divide these numbers.
[tex]P_{\text{senior}}=\frac{102}{526}=\frac{51}{263}\approx0.19[/tex]