Monday

March 30, 2015

March 30, 2015

Posted by **claire** on Thursday, April 9, 2009 at 11:49am.

the question is confusing me

- math -
**Reiny**, Thursday, April 9, 2009 at 1:41pmthe prob you will pick a correct first number = 4/10

the prob that the second one is correct = 3/9

etc

so the prob of drawing a 1,2,3, and 4

= (4/10)(3/)(2/8)(1/7) = 1/210

or

total number of ways of 'choosing' 4 specifics form 10 is C(10,4) = 210

only one of these will be the correct choice we want.

so prob = 1/120

- math -
**Reiny**, Thursday, April 9, 2009 at 1:44pmline << = (4/10)(3/)(2/8)(1/7) = 1/210 >>

should read

= (4/10)(3/9)(2/8)(1/7) = 1/210

and it looks like a transposed the digits in the last line

so prob = 1/210

**Answer this Question**

**Related Questions**

Pre Algebra - Four numbers are drawn from random tiles numbereed 0 through 9. ...

math - A card is drawn at random from an ordinary deck of playing cards. Find ...

math/probability - Hi. I have an answer for this question however, not sure. In ...

Math - If I have cards numbered 1 through 40 and I randomly draw 3 then replace ...

Math: please check - A card is drawn at random from an ordinary deck of playing ...

geometry - HELP.... In a certain lottery, 3 numbers between 1 and 9 inclusive ...

Math - In a certain lottery, five different numbers between 1 and 30 inclusive ...

Math (Combinatorics) - A lottery ball drawing machine has 50 balls, each labeled...

Math - a certain state's lottery game, lotto, is set up so that each player pays...

math - I have an SAT Question of the Day that I'm having trouble with. The ...