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[SOLVED] act.p.03 probability student range

karush

Well-known member
Jan 31, 2012
2,929
Screenshot 2021-05-07 1.39.36 AM.png
ok I guessed this to be 13 but ???? what about students who in the 65-71 range
I don't know of any equation to figure this other than just observation
 

skeeter

Well-known member
MHB Math Helper
Mar 1, 2012
938
12 students scored in the range 65 to 70
13 students scored in the range 65 to 80

wouldn't that mean only 1 student scored in the range 71 to 80 ?
 

karush

Well-known member
Jan 31, 2012
2,929
sorry i don't get it
 

skeeter

Well-known member
MHB Math Helper
Mar 1, 2012
938
call it a "linear" Venn diagram ...

score_range.jpg
 

karush

Well-known member
Jan 31, 2012
2,929
That helps :cool:
 

Country Boy

Well-known member
MHB Math Helper
Jan 30, 2018
758
Why would you read "13 students have grades in the range of 65 to 80" and conclude that "13 students have grades in the range 71 to 80"? 65 is NOT 71!

13 students have grades in the range 65 to 80 but 12 of those have grades in range 65 to 70.