A professor needs help from 3 student helpers to complete 4 tasks. The first tas

ID: 3397420 • Letter: A

Question

A professor needs help from 3 student helpers to complete 4 tasks. The first task is grading; the second is scanning; the third is copying, and the fourth is organizing student portfolios. The estimated time for each student to do each task is given in the matrix below.

Which of the following constraints represents the assignment for student A?

XA1 +XA2 + XA3 + XA4 = 0

XA1 +XA2 + XA3 + XA4 = 1

XA1 +XA2 + XA3 + XA4 1

XA1 +XA2 + XA3 + XA4 0

1 2 3 4 Student A 90 50 40 20 Student B 120 60 30 50 Student C 110 60 50 70