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30 June, 22:12

40% of oatypop cereal boxes contain a prize Hannah plans to keep buying cereal until she gets the prize. What is the probability that Hannah only has to buy 3 or less boxes before getting the prize

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  1. 30 June, 22:33
    0
    86%

    Step-by-step explanation:

    70+37+22=127

    129/150 = 0.86=86%
  2. 30 June, 22:40
    0
    She has a 88.4% chance to win.

    Step-by-step explanation:

    In order to determine whether she will win in 3 boxes or less, note that there is a 60% chance she will lose each time. To find the chance of her losing 3 times in a row, multiply 60% by itself 3 times.

    60% * 60% * 60% = 21.6%

    Now to find the amount of chance that she wins before this, subtract this number form 100%

    100% - 21.6% = 88.4%
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