Mathematics

No. of Days 1 2 3 4 5 6 No. of students 20 2x 60…

No. of Days123456
No. of students202x6040x50

The distribution above shows the number of days a group of 260 students were absent from school in a particular term. How many students were absent for t least four days in the term

  • A.
    180
  • B.
    120
  • C.
    110
  • D.
    40
Correct Answer: Option B
Explanation

20 + 2x + 60 + 40 + x + 50 = 250
170 + 3x = 260
3x = 260 – 170
3x = 90
x = 90/3 = 30
At least 4 days
4 days = 40
5 days = 30
6 days = 50
Total = 120