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18 September, 03:15

A bag contains 26 letters and 10 numerals. Robin draws two cards from the bag. What is the probability that she draws 2 numerals?

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Answers (2)
  1. 18 September, 03:42
    0
    On the first draw, there are 10 numerals out of 36 cards.

    P (first card is a number) = 10/36 = 5/18

    On the second draw, there are 9 numerals out of 35 cards.

    P (second card is a number) = 9/35

    The probability of both events is the product:

    P (both cards are numbers) = P (first card is a number) x P (second card is a number)

    = 5/18 x 9/35

    = 1/2 x 1/7 (cancel a 5 and a 9).

    = 1/14
  2. 18 September, 04:45
    0
    I believe it is 15. You add up 26 and 10 to get the total amount of objects. You then divide by how many you are trying to pull out.
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