Waec Mathematics Past Questions
Question 11
In a class of 45 students, 28 offer chemistry and 25 offer Biology. If each student offers at least one of the two subjects, calculate the probability that a student selected at random from the class the class offers chemistry only.
- A. \(\frac{2}{9}\)
- B. \(\frac{4}{9}\)
- C. \(\frac{5}{9}\)
- D. \(\frac{7}{9}\)
Question 12
| Marks | 0 | 1 | 2 | 3 | 4 | 5 |
| Frequency | 7 | 4 | 18 | 12 | 8 | 11 |
- A. 1.0
- B. 1.5
- C. 2.0
- D. 2.5
Question 13
| Marks | 0 | 1 | 2 | 3 | 4 | 5 |
| Frequency | 7 | 4 | 18 | 12 | 8 | 11 |
- A. 4
- B. 3
- C. 1
- D. 2
Question 14
In the diagram, PQ and PS are tangents to the circle O. If PSQ = m, <SPQ = n and <SQR = 33\(^o\), find the value of (m + n)
- A. 103\(^o\)
- B. 123\(^o\)
- C. 133\(^o\)
- D. 143\(^o\)
Question 15
In the diagram, PR is a diameter of the circle RSP, RP is produced to T and TS is a tangent to the circle at S. If < PRS = 24\(^o\), calculate the value of < STR
- A. 24\(^o\)
- B. 42\(^o\)
- C. 48\(^o\)
- D. 66\(^o\)
