ALGEBRA HELP WITH PROBABILITY AND CONFUSED

Algebra
Tutor: None Selected Time limit: 1 Day

Question:Helena has a set of number cards numbered 1 thru 10. If Helena randomly draws two cards from the deck, what is the probability that she will draw an odd number and then a two?

The answers are

A.
B.
C.
D.


So now my answer is 1/18, but its not on there, but 5/90 is and thats the unsimplified version
Apr 10th, 2015

The probability of taking an odd card from initial deck is 5/10 (or 1/2), then the probability to take a 2 from the remaining deck is 1/9. Either way we get 5/10 * 1/9 = 5*90 or 1/18 which is the same number.

Apr 10th, 2015

Thank you so much, hopefully it wont be counted as a wrong answer


Apr 10th, 2015

If you had only the four choices listed, then you had to choose 5/90 as it is equal to the right answer.

Apr 10th, 2015

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Apr 10th, 2015
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Apr 10th, 2015
Dec 8th, 2016
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