Waec Further Mathematics Past Questions and Answers

Question 166:

• WAEC 2014

Find the variance of 1, 2, 0, -3, 5, -2, 4.

A. \(\frac{52}{7}\)
B. \(\frac{40}{7}\)
C. \(\frac{32}{7}\)
D. \(\frac{27}{7}\)

Question 167:

• WAEC 2014

If the points (-1, t -1), (t, t - 3) and (t - 6, 3) lie on the same straight line, find the values of t.

A. T = -2 and 3
B. T = 2 and -3
C. T = 2 and 3
D. T = -2 and -3

Question 168:

• WAEC 2014

If a fair coin is tossed four times, what is the probability of obtaining at least one head?

A. \(\frac{1}{2}\)
B. \(\frac{1}{4}\)
C. \(\frac{13}{16}\)
D. \(\frac{15}{16}\)

Question 169:

• WAEC 2014

Forces 90N and 120N act in the directions and respectively. Find the resultant of these forces.

A. \(-45(2i + \sqrt{2}j)\)
B. \(60(\sqrt{3}i + 7j)\)
C. \(30(7i + \sqrt{3}j)\)
D. \(-15(7i + \sqrt{3}j)\)

Question 170:

• WAEC 2014

The deviations from the mean of a set of numbers are \((k+3)^{2}, (k+7), -2, \text{k and (} k+2)^{2}\), where k is a constant. Find the value of k.

A. 3
B. 2
C. -2
D. -3