Waec Further Mathematics 2016 Past Questions and Answers

Question 6:

• WAEC 2016

Given that \(n = 10\) and \(\sum d^{2} = 20\), calculate the Spearman's rank correlation coefficient.

A. 0.121
B. 0.733
C. 0.879
D. 0.979

Question 7:

• WAEC 2016

Find the variance of 11, 12, 13, 14 and 15.

A. 2
B. 3
C. \(\sqrt{2}\)
D. 13

Question 8:

• WAEC 2016

A fair coin is tossed 3 times. Find the probability of obtaining exactly 2 heads.

A. \(\frac{1}{8}\)
B. \(\frac{3}{8}\)
C. \(\frac{5}{8}\)
D. \(\frac{7}{8}\)

Question 9:

• WAEC 2016

A box contains 14 white balls and 6 black balls. Find the probability of first drawing a black ball and then a white ball without replacement.

A. 0.21
B. 0.22
C. 0.30
D. 0.70

Question 10:

• WAEC 2016

Given that \(r = 3i + 4j\) and \(t = -5i + 12j\), find the acute angle between them.

A. 14.3°
B. 55.9°
C. 59.5°
D. 75.6°