The probability that it rains on any given day in Lagos during the rainy season is 0.6. What is the probability that it rains on exactly 2 out of 3 randomly chosen days?
A0.288
B0.432CORRECT
C0.216
D0.096
GCEMathematicsProbability2021
AI
Toaster Teacher
Why the answer is B, and why the others tempt you.
Using the binomial probability formula, P(X = 2) = C(3,2) × (0.6)² × (0.4)¹ = 3 × 0.36 × 0.4 = 3 × 0.144 = 0.432.
Want this in Pidgin, Yoruba, Igbo or Hausa? Sign up free →
Practice more Mathematics questions
GCE Mathematics has thousands more questions like this — with Worked answers on every one.