Question

Bathsheba has 5 paintings in her house, 1 each in a color palette of red, yellow, blue, green, and purple. She hangs them randomly in a horizontal order. What is the probability of hanging the blue painting first, and then the green?


Select an answer

A.
1/5+1/5


B.
1/5∙1/5


C.
1/5∙1/4


D.
1/5

Answer 1

C. 1/5 · 1/4 = 1/20

Reason: P(blue first) = 1/5. Given blue is first, P(green second) = 1/4, so total probability = 1/5·1/4 = 1/20.