Mathematics 2012 WAEC Past Questions

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In \(\bigtriangleup\) XYZ, /XY/ = 8cm, /YZ/ = 10cm and /XZ/ = 6cm. Which of these relation is true?

A. /XY/ + /YZ/ = /XZ/
B. /XY/ - /YZ/ = /XZ/
C. /XY/² = /Y/² - /XY/²
D. /YZ/² = /XZ/² + /XY/²

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If cos(x + 40)^o = 0.0872, what is the value of x?

A. 85^o
B. 75^o
C. 65^o
D. 45^o

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A kite flies on a taut string of length 50m inclined at tan angle 54^o to the horizontal ground. The height of the kite above the ground is

A. 50 tan 30^o
B. 50 sin 54^o
C. 50 tan 54^o
D. 50 sin 36^o

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Given that the mean of the scores 15, 21, 17, 26, 18 and 29 is 21, calculate the standard deviation of the scores

A. \(\sqrt{10}\)
B. 4
C. 5
D. \(\sqrt{30}\)

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A bag contains 4 red and 6 black balls of the same size. If the balls are shuffled briskly and two balls are drawn one after the other without replacement, find the probability of picking balls of different colours

A. \(\frac{8}{15}\)
B. \(\frac{13}{25}\)
C. \(\frac{11}{15}\)
D. \(\frac{13}{15}\)

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