Register for an Upcoming Free GRE Webinar
Reserve your spot now!
Reserve your spot now!

ETS Additional Test 1st edition, Section 6, #5
by Jonathan Evans ·average of 100 #s = 23 
20. The average (arithmetic mean) of the 11 numbers in a list…
by RyanBornPowerScore ·sum/(# of #s) = average → sum/11 = 14 → sum = 81 is WRONG!! 
20. The average (arithmetic mean) of the 11 numbers in a list…
by darsh06 ·sum/(# of #s) = average → sum/11 = 14 → sum = 81 is WRONG!! 
9. The numbers in which of the following lists…
by RyanBornPowerScore ·sum/(# of #s) = average → (–25 + –10 + 0 + 10 + 25)/5 → (–25 + 25 + –10 + 10 + 0)/5 → 0/5 = 0 
2. Of 30 theater tickets sold, 20 tickets were sold…
by RyanBornPowerScore ·sum/(# of #s) = average → $1200/30 = $40 
17. If a ≤ b ≤ c ≤ d ≤ e ≤ 110 and…
by RyanBornPowerScore ·* Plug the information provided (the average of a, b, c, d, and e is 100) into the average formula: sum /(# of #s) = average → sum/5 = 100 → sum = 500 
20. A tailor used 30 buttons that had an average (arithmetic mean) weight…
by RyanBornPowerScore ·sum /(# of #s) → sum1/30 = x → sum1 = 30x 
3. Ray is 2 inches taller than…
by RyanBornPowerScore ·sum/(# of #s) = average → [x + (x + 1) + (x + 3)]/3 → (3x + 4)/3 → (3x/3) + 4/3 → x + 4/3 
20. The average (arithmetic mean) of the 11 numbers in a list…
by RyanBornPowerScore ·sum/(# of #s) = average → sum/11 = 14 → sum = 154 
13. For the 3 numbers in a list, the average (arithmetic mean)…
by RyanBornPowerScore ·sum/(# of #s) = average → [x + 8 + (x + 10)]/3 = 8 → x + 8 + (x + 10) = 24 → 2x + 18 = 24 → 2x = 6 → x = 3 
6. The average of 100 measurements is 23…
by RyanBornPowerScore ·average = sum/(# of #s) → 23 = sum1/100 → sum1 = 2300