MathDB
AJHSME 1991 Problem 22

Source:

June 24, 2011
probabilityPurple Comet

Problem Statement

Each spinner is divided into 33 equal parts. The results obtained from spinning the two spinners are multiplied. What is the probability that this product is an even number?
[asy] draw(circle((0,0),2)); draw(circle((5,0),2)); draw((0,0)--(sqrt(3),1)); draw((0,0)--(-sqrt(3),1)); draw((0,0)--(0,-2)); draw((5,0)--(5+sqrt(3),1)); draw((5,0)--(5-sqrt(3),1)); draw((5,0)--(5,-2)); fill((0,5/3)--(2/3,7/3)--(1/3,7/3)--(1/3,3)--(-1/3,3)--(-1/3,7/3)--(-2/3,7/3)--cycle,black); fill((5,5/3)--(17/3,7/3)--(16/3,7/3)--(16/3,3)--(14/3,3)--(14/3,7/3)--(13/3,7/3)--cycle,black); label("11",(0,1/2),N); label("22",(sqrt(3)/4,-1/4),ESE); label("33",(-sqrt(3)/4,-1/4),WSW); label("44",(5,1/2),N); label("55",(5+sqrt(3)/4,-1/4),ESE); label("66",(5-sqrt(3)/4,-1/4),WSW); [/asy]
(A) 13(B) 12(C) 23(D) 79(E) 1\text{(A)}\ \frac{1}{3} \qquad \text{(B)}\ \frac{1}{2} \qquad \text{(C)}\ \frac{2}{3} \qquad \text{(D)}\ \frac{7}{9} \qquad \text{(E)}\ 1