One in ten bikes at the bike-a-thon is likely to earn at least $30. If there are 78 riders, about how many of them might earn $30?
2007-01-07 10:24:34 · 3 answers · asked by sammie_428 1 in Sports ➔ Cycling
All 78 might earn $30 could be none. The bell curve peaks at 7.8.
Using a guessed deviation and assuming no tandems 3-13 would account for 90% of outcomes.
In reality cyclists are a pretty generous bunch.If you advertised at the right places there would be a lot more than 78 turn up and you would raise a lot more than $30 each.
2007-01-08 22:21:29 · answer #1 · answered by Glenn B 7 · 0⤊ 0⤋
1/10=10%
10% of 78 =7.8 since .8 of a person can not exist, people will earn $30
2007-01-07 10:31:28 · answer #2 · answered by trany 2 · 0⤊ 0⤋
approximately 8, 7.8 exactly.
2007-01-07 10:31:50 · answer #3 · answered by Rictuar 2 · 0⤊ 0⤋