BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

new exercise

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Wed Jul 10, 2019 1:05 pm

new exercise

by Heimer » Wed Jul 10, 2019 1:47 pm

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

The numbers of products a store sold on 4 consecutive days were x, x + 5, x + 3 and x + 12. If the average of the products sold was 13, what is the value of x?
(a) 4
(b) 6
(c) 7
(d) 8
(e) 11
Top
Source: — Problem Solving |
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Wed Jul 10, 2019 1:05 pm

by Heimer » Wed Jul 10, 2019 1:47 pm
Solution: The average of the 4 numbers is: (x + x + 5 + x + 3 + x + 12)/4,
(x + x + 5 + x + 3 + x + 12)/4 = 13
(4x + 20)/4 = 13
x + 5 = 13
x = 8
Top
Post new topic Post Reply
• Page 1 of 1