Waec Mathematics 2017 Past Questions and Answers

Question 31:

• WAEC 2017

Consider the statements: p it is hot, q: it is raining
Which of the following symbols correctly represents the statement "It is raining if and only if it it is cold"?



A. P \(\iff\) \(\sim\)q
B. P \(\iff\) q
C. \(\sim\)p \(\iff\) \(\sim\)q
D. Q \(\iff\) \(\sim\)p

Question 32:

• WAEC 2017

Given that t = \(2 ^{-x}\), find \(2 ^{x + 1}\) in terms of t.

A. \(\frac{2}{t}\)
B. \(\frac{t}{2}\)
C. \(\frac{1}{2t}\)
D. T

Question 33:

• WAEC 2017

Two bottles are drawn with replacement from a crate containing 8 coke, 12 and 4 sprite bottles. What is the probability that the first is coke and the second is not coke?

A. \(\frac{1}{12}\)
B. \(\frac{1}{6}\)
C. \(\frac{2}{9}\)
D. \(\frac{3}{8}\)

Question 34:

• WAEC 2017

If the simple interest on a certain amount of money saved in a bank for 5 years at 2\(\frac{1}{2}\)% annum is N500.00, calculate the total amount due after 6 years at the same rate

A. N2,500.00
B. N2,600.00
C. N4,500.00
D. N4,600.00

Question 35:

• WAEC 2017

Calculate the variance of 2, 3, 3, 4, 5, 5, 5, 7, 7 and 9

A. 2.2
B. 3.4
C. 4.0
D. 4.2