Mathematics

Carl Wheeler

14 November, 11:17

Chayton read a report that said the probability that a randomly selected American is left-handed is 14%.

He was curious how many left-handed students to expect in a class of 20 students.

He simulated 25 classes of 20 students where each student selected had a 0.14 probability of being left-

handed.

Chayton counted how many left-handed students were in each simulated class. Here are his results:

S

...

0 1 2 3 4 5

# of left-handed students

Use his results to estimate the probability that there are 2 or fewer left-handed students in a class of 20

students.

Give your answer as either a fraction or a decimal.

P (2 or fewer left-handed) =