Mathematics

No. of days 1 2 3 4 5 6 No. of students 20 x 50…

No. of days123456
No. of students20x50402x60

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

  • A.
    210
  • B.
    40
  • C.
    120
  • D.
    160
Correct Answer: Option D
Explanation

20 + X + 50 + 40 + 2X + 60 = 260
3X + 170 = 260
3X = 260 – 170
3x = 90
x = 30
Absent for at least 4 days

456
402x60

i.e 40 + 2x + 60 = 40 + (2 x 30) + 60
= 40 + 60 + 60
= 160