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Math Help - Please help to find probablity

  1. #1
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    Please help to find probablity

    There are some cards with pictures of objects on. There are 13 mice, 4 monkeys, 4 roses,2 oak trees and 7 hen cards. When you pick a card, what is the probability of picking ananimal?

    Choose TWO letters for the answer:

    (A) You have an even chance.
    (B) You have a greater than even chance.
    (C) Less than 1%
    (D) 100%
    (E) 0
    (F) 3/4
    (G) 4/5
    (H) 2/3
    (I) 1/5
    (J) 0.5

    With thanks
    Alan
    Last edited by CaptainBlack; June 3rd 2010 at 10:40 PM.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by alanpaul View Post
    There are some cards with pictures of objects on. There are 13 mice, 4 monkeys, 4 roses,2 oak trees and 7 hen cards. When you pick a card, what is the probability of picking ananimal?

    Choose TWO letters for the answer:

    (A) You have an even chance.
    (B) You have a greater than even chance.
    (C) Less than 1%
    (D) 100%
    (E) 0
    (F) 3/4
    (G) 4/5
    (H) 2/3
    (I) 1/5
    (J) 0.5

    With thanks
    Alan
    With equally likely outcomes the probability is the ratio of favourable cases to the total number of outcomes.

    Here the question is ambiguous to some extent since I suspect that you are not supposed to consider hens as animals.

    So the probability is the number of animal cards divided by the total number of cards.

    CB
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