Waec Further Mathematics 2015 Past Questions and Answers

Question 16:

• WAEC 2015

Given that \(r = 2i - j\), \(s = 3i + 5j\) and \(t = 6i - 2j\), find the magnitude of \(2r + s - t\).

A. \(\sqrt{15}\)
B. 4
C. \(\sqrt{24}\)
D. \(\sqrt{26}\)

Question 17:

• WAEC 2015

Marks	0	1	2	3	4	5
Number of candidates	6	4	8	10	9	3

The table above shows the distribution of marks scored by students in a test. How many candidates scored above the median score?

A. 3
B. 12
C. 22
D. 30

Question 18:

• WAEC 2015

Marks	0	1	2	3	4	5
Number of candidates	6	4	8	10	9	3

The table above shows the distribution of marks scored by students in a test. Find the interquartile range of the distribution.

A. 4
B. 3
C. 2
D. 1

Question 19:

• WAEC 2015

A mass of 75kg is placed on a lift. Find the force exerted by the floor of the lift on the mass when the lift is moving up with constant velocity. \([g = 9.8ms^{-2}]\)

A. 750N
B. 745N
C. 735N
D. 98N

Question 20:

• WAEC 2015

Each of the 90 students in a class speak at least Igbo or Hausa. If 56 students speak Igbo and 50 speak Hausa, find the probability that a student selected at random from the class speaks Igbo only.

A. \(\frac{28}{45}\)
B. \(\frac{4}{9}\)
C. \(\frac{8}{45}\)
D. \(\frac{1}{9}\)