In the last two years, each of Jeremys six children grew in height by at least one inch. If the standard deviation of their heights two years ago was 4.5 inches, what is the standard deviation of their heights?
(1) In the last two years, the heights of Jeremys six children have increased a total of 17 inches.
(2) In the last two years, each childs height has increased by 5 percent.
"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."
My Integrated Reasoning Logbook / Diary: my-ir-logbook-diary-133264.html
GMAT Club Premium Membership - big benefits and savings