Question

A principal records the lunch choices for 7th grade for a day. Of the 160 students, 21 brought their lunch from home, 103 purchased lunches, and 36 brought a lunch from home and purchased an ice cream.

Are the lunch choices equally as likely? Justify your answer by calculating the probability of each lunch choice.

Answer 1

All of the lunch choices are not equally as likely.

Explanation:

Of the 160 students:

21 brought lunch from home = 21/160 = 0.13125

103 purchased lunch = 103/160 = 0.64375

36 lunch + ice cream = 36/160 = 0.225

The probability = what type of lunch a student brings / student population

I hope this helps! Let me know if you have any further questions.