1995 - JAMB Mathematics Past Questions and Answers - page 5

\(\begin{array}{c|c} & W & W & W & W & B & B \ \hline W & WW & WW & WW & WW & WB & WB \ W & WW & WW & WW & WW & WB & WB\W & WW & WW & WW & WW & WB & WB\ B & BW & BW & BW & BW & BB & BB \ B & BW & BW & BW & BW & BB & BB\end{array}\)

P(WW) = \(\frac{16}{36}\)

= \(\frac{4}{9}\)

-1 \(\geq\) x \(\geq\) 1, 1 < x \(\geq\) 2

Combining solutions

= x \(\leq\) 1; 1 \(\geq\) x \(\geq\) 2

XTY = 50^o = TXY = \(\frac{130^o}{2}\)

= 65^o

Area(S) = 2\(\pi r^2 + 2 \pi rh = 2\pi r(h + r)\)

D = 14cm, 2r = D

r = \(\frac{D}{2}\)

= 7cm

S = 2 x \(\frac{22}{7} \times [7 + 12] = 44 \times 19\)

= 836cm²

PQ x 10 sin 30 = 35

PQ = \(\frac{35}{10 \sin 30}\)

= 7cm

m = 1.05, r = 0.6

m + r = 1.05 + 0.5

= 1.65