princessss wrote:Angela's grade was in the 90th percentile out of 80 grades in her class. In another class there were 19 grades higher than Angela's. If nobody had Angela's grade, then Angela was what percentile of the two classes combined?
a) 72
b) 80
c) 81
d) 85
e) 92
Angela's grade was 90th percentile.
which means 90% of the graders were below her.
90% of 80 = 72
Hence 71 were below Angela's grade and 8 were above.
In another calss 60 were below Angela's grade and 19 were above.
Combined:
131 were below and 27 were above.
Total strength= 80 + 80= 160
Hence angela's percentile = 131/160 * 100 = 81....
pick C.
I think I am missing something. Whats OA?
"Once you start working on something,
don't be afraid of failure and don't abandon it.
People who work sincerely are the happiest."
Chanakya quotes (Indian politician, strategist and writer, 350 BC-275BC)
thank for your help
