Homework Help: Math

Posted by REBA on Monday, June 15, 2009 at 12:50pm.

In a survey of 50 students, 23 owned cellular phones, 18 ownded digital cameras, X owned cellular phones and digital camera, 2X owned neither.
a) How do i write an expression in X for the Total number of students in the survey and how do i find for X????

Math - drwls, Monday, June 15, 2009 at 1:01pm
23-X owned digital camers ONLY
18-X owned a cell phone ONLY
X owned both
2X owned neither.
Those are the only four possibilities, so the sum must equal 50.
41 - 2X +X +2X = 50
41 +X = 50
X = 9

Answer this Question

Related Questions

math 104 - From a survey of 100 college students, a marketing research company ...
math - From a survey of 200 college students, a marketing research company found...
Math - From a survey of 100 college students, a marketing research company found...
ALGEBRA - From a survey of 100 college students, a marketing research company ...
College math - From a survey of 100 college students, a marketing research ...
math - From a survey of 100 college students, a marketing research company found...
math - From a survey of 100 college students, a marketing research company found...
math - From a survey of 100 college students, a marketing research company found...
math - From a survey of 200 college students, a marketing research company found...
Math 104 - From a survey of 200 college students, a marketing research company ...

For Further Reading

First Name:
School Subject:
Answer: