Question

1. students were asked what they are allergic to. the table shows the results.

if a student is chosen at random, what is the probability that they:
...
7c do not have an allergy?
probability = enter your next step here

Explanation:

Step1: Find total number of students

From previous parts, total students are 90.

Step2: Find number of students with allergies

From previous, students with allergies: \(17 + 19 + 28 = 64\)

Step3: Find students without allergies

Subtract allergic from total: \(90 - 64 = 26\)

Step4: Calculate probability

Probability = \(\frac{\text{No allergy}}{\text{Total}}=\frac{26}{90}\)
Simplify: \(\frac{13}{45}\approx0.289\)

Answer:

\(\frac{13}{45}\) (or approximately \(0.289\))