Waec Mathematics 2000 Past Questions and Answers

Question 21:

• WAEC 2000

Calculate the standard deviation of the following marks; 2, 3, 6, 2, 5, 0, 4, 2

A. 1.5
B. 1.7
C. 1.8
D. 1.9

Question 22:

• WAEC 2000

The probabilities that Kodjo and Adoga pass an examination are \(\frac{3}{4}\) and \(\frac{3}{5}\) respectively. Find the probability of both boys failing the examination

A. \(\frac{1}{10}\)
B. \(\frac{3}{10}\)
C. \(\frac{9}{20}\)
D. \(\frac{2}{3}\)

Question 23:

• WAEC 2000

Which of the following statement is not true about a rectangle? I.Each diagonal cuts the rectangle into two congruent triangles. II. A rectangle has four lines of symmetry III. The diagonals intersect at right angles

A. I and II only
B. III only
C. II only
D. II and III only

Question 24:

• WAEC 2000

In the diagram, PQRS is a circle center O. PQR is a diameter and ∠PRQ = 40°. Calculate ∠QSR.

A. 30^o
B. 40^o
C. 45^o
D. 50^o

Question 25:

• WAEC 2000

Each side of a regular convex polygon subtends an angle of 30° at its center. Calculate each interior angle

A. 75^o
B. 150^o
C. 160^o
D. 68^o