Question

given the table below, what is the probability that a randomly chosen student:
is in 12th grade?
rides the bus to school?
is a 10th grader who walks to school?
a senior who drives to school (or rides in a car)?
bikes to school given that they are in 11th grade?
is an upperclassman (junior or senior) given they walk to school?

Explanation:

Step1: Find upperclassmen who walk

Upperclassmen = 11th + 12th grade. Walk counts: 72 (11th) + 84 (12th) = 156.

Step2: Total walkers

From table, total walkers = 259.

Step3: Calculate probability

Probability = Upperclassmen walkers / Total walkers = $\frac{156}{259}$.

Answer:

$\frac{156}{259}$