Answer:
The Probability that Chloe wins is 
Step-by-step explanation:
We are given 4 chocolates and 1 fruit chew.
this means we have total 5 choices.
Now Clark draws first. and there is no replacement that means if one treat is drawn it won't be counted again.
<em>Now we need to find the probability that Chloe wins i.e. he draws out the fruit chew one.</em>
Probability=
where the first term in the summation i.e.
shows that in the first turn Clark draws a chocolate box out of the 5 boxes and Chloe in his first turn draws a fruit chew and wins.
whereas second term in the summation shows that Chloe draws a fruit chew in his second draw.
Probability=
Hence, the Probability that Chloe wins is 