Step 1: The probability of any event can be defined as:
![\text{Probability of any event = }\frac{N\text{umber of required outcomes}}{N\text{umber of total possible outcomes}}](https://img.qammunity.org/2023/formulas/mathematics/college/3uwov3uzxepdco7rbo4tuw5a2ov8he10j8.png)
Step 2:
Look at the word LOLLIPOP and the word HALLOWEEN
Number of total possible outcomes = 8
Number of required outcomes = 5
(Because L and O are the only letters in the word HALLOWEEN)
Step 3:
![\begin{gathered} \text{Therefore,} \\ \text{Probability that the letter pick from LOLLIPOP is a letter in HALLOWEEN } \\ =(5)/(8)\text{ } \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/4xyiukz9al38ckxvnhqw6gatrmqpu24q8x.png)
Step 4: Final answer
= 5/8