GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 29 Jan 2020, 07:12

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

### Show Tags

01 Jan 2018, 10:22
1
1
00:00

Difficulty:

45% (medium)

Question Stats:

67% (01:42) correct 33% (02:13) wrong based on 33 sessions

### HideShow timer Statistics

In each of the first two months of the year Janet saved $60 for her spring break trip. In the next three months she saved$75, $115, and$70 for the trip. How much does she need to save in the sixth and final month if she is to achieve her goal of $85 a month saved on average (arithmetic mean)? A.$190
B. $130 C.$115
D. $110 E.$100

_________________
Intern
Joined: 28 Dec 2017
Posts: 29
Re: In each of the first two months of the year Janet saved $60 for her sp [#permalink] ### Show Tags 01 Jan 2018, 14:29 (60 + 60 + 75 + 115 + 70 + x) / 6 = 85 Solving for x: 380 + x = 510 x =$130 (Answer B)
Manager
Joined: 26 Mar 2019
Posts: 108
Concentration: Finance, Strategy
Re: In each of the first two months of the year Janet saved $60 for her sp [#permalink] ### Show Tags 14 Dec 2019, 05:18 Quote: In each of the first two months of the year Janet saved$60 for her spring break trip. In the next three months she saved $75,$115, and $70 for the trip. How much does she need to save in the sixth and final month if she is to achieve her goal of$85 a month saved on average (arithmetic mean)?

A. $190 B.$130
C. $115 D.$110
E. $100 Initially, I thought that there are 7 months in total, but then analyzing the answer choices, I realized that the sixth month is the final one. Let us write down what we have: January -$60
February - $60 March -$75
April - $115 May -$70

The money Janet needs to save for the last month (June) has to be equal to the amount which will give us $85 as an arithmetic average for 6 months. The formula for arithmetic mean is the following: $$A = \frac{a_1 + a_2 ... + a_n }{ n}$$ We have $$A = \frac{(60 + 60 + 75 + 115 + 70 + x) }{ 6} = 85$$ $$A = \frac{(380 + x) }{ 6} = 85$$ Therefore, $$380 + x = 85 * 6 = 510$$ $$x = 510 - 380 = 130$$ Answer: B Re: In each of the first two months of the year Janet saved$60 for her sp   [#permalink] 14 Dec 2019, 05:18
Display posts from previous: Sort by