Official Solution: Bunuel
At a Halloween-themed event, a group of guests attended a party where each guest wore a costume of one of the types listed in the table. The guests were offered different types of Halloween treats, including candy, apple cider, and pumpkin pastries. Each guest was allowed to choose only one type of treat, and the table below summarizes the treat preferences for the listed costume types only.
| Costume Type | Number of Guests | Chose Candy (%) | Chose Apple Cider (%) | Chose Pumpkin Pastry (%) |
| Witch | 15 | 40% | 20% | 40% |
| Vampire | 12 | 50% | 25% | 25% |
| Zombie | 20 | 30% | 40% | 30% |
| Ghost | 10 | 10% | 50% | 40% |
| Skeleton | 8 | 25% | 25% | 50% |
Select
Yes if the question can be answered from given info. Otherwise, select
No.
We are asked to check which statements can be answered using the given info.
Statement 1: Number of guests who chose candy = number of witches who chose candy + number of vampires who chose candy + number of zombies who chose candy + number of ghosts who chose candy + number of skeletons who chose candy = 15*0.4 + 12*0.5 + 20*0.3 + 10*0.1 + 8*0.25 = 21. So, this question can be answered.
Statement 2: The new percentage of zombies choosing apple cider would be 40% + 10% = 50%. So, this question can be answered.
Statement 3: There is no information in the table or stem about the gender of any guests. The chart only gives costume type, number of guests, and their treat preference. Since gender is not mentioned anywhere, we cannot determine how many candy-choosing guests were female.
Correct answer: What is the total number of guests who chose candy as their Halloween treat?
"Yes"If 10% of the zombies decide to switch from a pumpkin pastry to apple cider instead, what would be the new percentage of zombies choosing apple cider?
"Yes"How many of the guests who chose candy were female?
"No"