Posted by Paige on Saturday, December 4, 2010 at 4:21am.
From 1 to 99 there are 10 + 9 = 19 with at least one 3. They are:
3, 13, 23, 33, 43, 53, 63, 73, 83, 93,
and 30, 31, 32, 34, 35, 36, 37, 38, and 39
From 100 to 199 there are 19 with at least one 3.From 200 to 299 there are again 19.
From 300 to 399 there are 100 with at least one 3 (all of them).
Using similar arguments, there are 6*19 = 114 more with at least one 3.
The total is 252 and the probability of winning is 25.2%
Related Questions
math - Mr. and Mrs. Smith each bought 10 raffle tickets. Each of their three ...
Math - Volunteers working to raise funds for a new community library sold 1000 ...
College Math - Volunteers working to raise funds for a new community library ...
stats math - Suppose you are selling raffle tickets for $3.00 each. You have the...
4th grade iconimics - a total of 200 raffle tickets have been sold, and 50 of ...
statistics - Suppose that neighborhood soccer players are selling raffle tickets...
Math - The seventh graders sold tickets to their play.the tickets cost $3 for ...
5th grade - out of 100 tickets sold at a school raffle jack bought 5 mat bought ...
probability - A batch of 350 raffle tickets contatins 4 winning tickets. You buy...
math - Eric and Albert won prizes for selling the most raffle tickets. Together ...
For Further Reading
