NECO 2024 · Paper 1 · Q57

The table shows the ages of students in a class. What is the probability that a student chosen at random is less than 18 years old?

Age (years) 16 17 18
No. of students 4 8 6
Worked solution (try it first)
  1. There are 4+8+6=184 + 8 + 6 = 18 students.
  2. Less than 18 years means 16 or 17: 4+8=124 + 8 = 12 students.
  3. So the probability is 1218=23\frac{12}{18} = \frac23, option C.

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