Sunday

April 20, 2014

April 20, 2014

Posted by **Paige** on Saturday, December 4, 2010 at 4:21am.

- Maths - Probability -
**drwls**, Saturday, December 4, 2010 at 6:54amFrom 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 ...

Statistics - A school is running a raffle. There are 100 tickets, of which 3 are...

Probability - A school is running a raffle for two prizes. 59 tickets were sold ...

probability - A batch of 350 raffle tickets contatins 4 winning tickets. You buy...

stats math - Suppose you are selling raffle tickets for $3.00 each. You have the...

Statistics - "A batch of 350 raffle tickets contains three winning tickets. You ...

Math - I have 5 tickets for a raffle and I know that the probability of my ...

Statistics - There is a $2 raffle with a first prize of $10000, a second prize ...