Butterflies and bees

There were 35 flowers in the garden. The butterflies were on 17 flowers. There were butterflies and bees on eight flowers. Can you find out how many flowers were only bees? Note. There was a maximum of one butterfly and a maximum of one bee on each flower. Each flower was occupied.

Final Answer:

v =  10

Step-by-step explanation:

$$\begin{gathered} M=17 \\ n=M\cup V \\ x=M\cap V \\ n=35 \\ x=8 \\ V=n-M=35-17=18 \\ v=V-x=18-8=10 \end{gathered}$$

Try another example