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Question:

corine
corine
Student

There are twenty alphabet cards in a big bag. If the probability of pulling a vowel is 1 out of 5, how many consonant cards are there?

If the probability is 1 out of  5, it might be that the answer 3.

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Posted by corine on Tuesday February 10, 2009 at 8:52 PM and tagged with math, probability.

Answers:


  1. adrigon Teacher
    High School - 12th Grade

    1/5 x 20 = 4 vowels

    20 - 4 = 16 consonants

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    Posted by adrigon on Tuesday February 10, 2009 at 11:14 PM

  2. mrsmott
    mrsmott Teacher
    Middle School

    If 1 out of 5 is a vowel, then 4 out of 5 are consonants. Now you have to set your 1 out of 5 equivalent to something out of 20 (your total number of cards) so 4 out of 20 will be vowels and 16 of 20 are consonants. (because 4 + 16 = 20) :)

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    Posted by mrsmott on Saturday February 14, 2009 at 7:29 PM