Question

Sierra Ridge Middle School is getting a new lunchroom. Robert is surveying a random

selection of students to find out what new features they'd like to add. The table below shows
how many students surveyed have ranked each feature as their first choice. Robert wants to
survey at least 50 more students.
Lunchroom feature Number of students
sound system
10
water cooler
7
painted mural
4
bulletin boards
5
Based on the data, estimate how many of the next 50 students surveyed will rank a water
cooler as their first choice of additions to the lunchroom.
If necessary, round your answer to the nearest whole number.
students

Answer 1

Answer: 13

Step-by-step explanation:First, based on the data, find the probability of a water cooler being a student's first choice of additions to the lunchroom.

Robert has surveyed 10+7+4+5=26students.

7 of these students ranked a water cooler as their first choice.

So, the probability of a water cooler being a student's first choice of additions to the lunchroom is

7

26

.

You can estimate how many of the next 50 students surveyed will rank a water cooler as their first choice by assuming that

7

26

of the 50 students will do so. Find

7

26

of 50.

7

26

50=13.461…

Based on the data, about 13 students out of the next 50 surveyed will rank a water cooler as their first choice of additions to the lunchroom.