Recent content by amywilliams99

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    Understanding Normal Distribution and Calculating Probability for Safe Sailing

    If anyone could help me with the following Q it would be much appreciated! Womens weights - N (68kg, (18)^2 kg) Mens Weights - N (82kg, (15)^2 kg) Mary and Jon are sailing a raft. Marys equipment weights 20% of her weight. Jons weighs 50% of his weight. The raft will sink if the total...
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    Improve Test Scores: Solving Probability Problems with Expert Help

    Thank you SO much, I understand!
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    Improve Test Scores: Solving Probability Problems with Expert Help

    Can I ask why 1/12 for the probability of doesn't know and guesses right? Wouldnt it be 1/4, given that there are 4 possible multiple choice answers?
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    Improve Test Scores: Solving Probability Problems with Expert Help

    A student is about to take a test, which consists of 12 multiple choice questions. Each question has 4 possible answers, of which only one is correct. The student will answer each question independently. For each question, there is a probability 2/3 that he knows the correct answer...
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