A die has four of it's faces coloured white and the remaining two coloured black....

JAMB 1995

A die has four of it's faces coloured white and the remaining two coloured black. What is the probability that when the die is thrown two consecutive time, the top face will be white in both cases?

A. \(\frac{5}{3}\)
B. \(\frac{1}{9}\)
C. \(\frac{4}{9}\)
D. \(\frac{1}{36}\)

WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now

Your School's Whatsapp Group - Join Us now

Correct Answer: Option C

Explanation

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

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

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

Previous Next

Go back to Maths classroom

Report an Error Ask A Question Download App