I27-29

Question

Lisa is planning her New Year’s Eve party and needs to budget for decorations, food, and drinks. She also wants to hire entertainment for her guests. Here's what she knows:
 
• Decorations and Lighting: She plans to decorate 3 rooms. Decorations cost $35 per room, and special lighting adds an additional $8 per room.
 
• Food: Appetizers cost $3 per guest, and main courses cost $10 per guest. She expects 20 guests, and 25% of them will each bring one additional guest.
 
• Drinks: Drinks are sold in cases of 12 bottles for $30 per case. Each guest is expected to drink an average of 2 bottles. Lisa wants to buy enough for all guests, plus 10% extra bottles.
 
• Entertainment: A live band charges $300 for the first hour and $125 for each additional hour. Lisa wants them to play for 3 hours in total.
 
Based on the above information, select for  Food & Setup Cost  the total amount Lisa will spend on decorations and lighting, food, and drinks and select for  Entertainment Cost  the total amount she will spend on the band.

Bunuel · Answer

Official Solution:

Food & Setup Cost 
 
Lisa expects 20 guests. 25 percent will bring one additional guest each. That adds 5 more guests, for a total of 25.
 
• Decorations: Each room costs 35 for decorations and 8 for lighting. For 3 rooms, the total cost is (35 + 8) * 3 = 129.
 
• Food: Appetizers cost 3 per guest and main courses cost 10 per guest. With 25 guests, the total food cost is (3 + 10) * 25 = 325.
 
• Drinks: Each guest is expected to drink 2 bottles. For 25 guests, that's 25 * 2 = 50 bottles. Adding 10 percent extra gives 55 bottles. Since bottles are sold in cases of 12, Lisa needs to buy 5 cases. Each case costs 30, so the total drink cost is 5 * 30 = 150.
 
Food and setup total is 129 + 325 + 150 = 604.
 
 Entertainment Cost 
 
Entertainment costs 300 for the first hour and 125 for each of the next two hours. Total is 300 + 2 * 125 = 550.

Correct answer:

Food & Setup Cost  "$604"

Entertainment Cost  "$550"

Adit_ · Answer

For this problem they say " Lisa wants to buy enough for all guests, plus 10% extra bottles." However as per OA if we include the case based sell off then it wont be just 10% wouldnt that contradict the statement? I considered 55 bottles as it is and thus landed with 595 as the closest answer.

Bunuel · Answer

No, there is no contradiction: 55 bottles is the minimum she wants, but since drinks are sold only in whole cases, she must round up to 5 cases, which gives 60 bottles.

Adit_ · Answer

So in such questions its always safe to assume that nothing below the number offered in each cases are sold? Like if another question may say its selling only in dozens then it always sells in dozens kind of thing.

Bunuel · Answer

“Sold in cases” means you can buy only whole cases. How else?

Food & Setup Cost	Entertainment Cost
		\(508
		\)537
		\(550
		\)586
		\(595
		\)604

I27-29

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

Food & Setup Cost	Entertainment Cost
		$508
		$537
		$550
		$586
		$595
		$604