Neco Mathematics Past Questions and Answers

Question 61:

• NECO 2002

One bag contains 4 white balls and 2 black balls. Another bag contains 3 white balls and 5 black balls, if one ball is drawn from each bag, what is the probability that both are white?

A. \(\frac{2}{3}\)
B. \(\frac{3}{8}\)
C. \(\frac{7}{24}\)
D. \(\frac{1}{4}\)
E. \(\frac{1}{24}\)

Question 62:

• NECO 2002

A quadratic equation with roots -1\(\frac{1}{2}\) and \(\frac{1}{4}\) is

A. X² + 3x + 4 = 0
B. 8x² + 10x + 3 = 0
C. 8x² +12x – 3 = 0
D. 8x² + 10x-3.= 0
E. 8x² + 12x + 3 = 0

Question 63:

• NECO 2002

What are the factors of 2x\(^2\) - xy - 3y\(^2\) ?

A. (2x + 3y)(x + y)²
B. (2x + 3y)(x + y)
C. (2x + 3y)(x - y)
D. (2x - 3y)(x + y)
E. (2x - 3y)(x - y)

Question 64:

• NECO 2002

If sin θ = \(\frac{\sqrt{3}}{2}\) and 0 < θ < 180°, what is cos θ ?

A. \(\frac{1}{\sqrt{3}}\)
B. \(\frac{2}{\sqrt{3}}\)
C. \(\frac{1}{2}\)
D. \(\frac{\sqrt{3}}{2}\)
E. \(\sqrt{3}\)

Question 65:

• NECO 2002

Three sets of rice x, y and z are sold for N15.00, N35.00 and N60.00 respectively per kg. It they are mixed in the ratio of 1: 3 : 2, what is the cast per kg of the mixture?

A. N45.00
B. N42.50
C. N40.00
D. N35.50
E. N25.80