Subject: mathqa
Question: in a garden , there are yellow and green flowers which are straight and curved . if the probability of picking a green flower is 1 / 8 and picking a straight flower is 1 / 2 , then what is the probability of picking a flower which is yellow and straight
Option: 
A: 1 / 7
B: 1 / 8
C: 4 / 9
D: 3 / 4
Answer: C