Mathematics 1998 WAEC Past Questions

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A box contain 2 white and 3 blue identical balls. If two balls are picked at random, one after the other, without replacement, what is the probability of picking two balls of different colours?

A. \(\frac{5}{25}\)
B. \(\frac{7}{20}\)
C. \(\frac{3}{5}\)
D. \(\frac{2}{3}\)
E. \(\frac{5}{6}\)

View Answer & Discuss (7) WAEC 1998

In ∆PQR. ∠PQR is a right angle. |QR| = 2cm and ∠PRQ = 60o. Find |PR|

A. 4√3cm
B. 4cm
C. 2√3cm
D. \(\frac{4}{3}cm\)
E. 1cm

View Answer & Discuss (9) WAEC 1998

In the diagram, PQ||SR. Find the value of Z

A. 30^o
B. 40^o
C. 45^o
D. 90^o
E. 120^o

View Answer & Discuss (5) WAEC 1998

In \(sin(X+30)^o=cos40^o\),find X

A. 10^o
B. 20^o
C. 50^o
D. 60^o
E. 90^o

View Answer & Discuss WAEC 1998

Find the value of X if \(cos x = \frac{5}{8}\) for \(0^o\le X\le 180^o\)

A. 141.3^o
B. 128.7^o
C. 51.3^o
D. 48.7^o
E. 38.7^o

View Answer & Discuss (2) WAEC 1998

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