1)Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a h
ID: 2912634 • Letter: 1
Question
1)Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing four red marbles, five green ones, four white ones, and three purple ones. She grabs eight of them. Find the probability of the following event, expressing it as a fraction in lowest terms.
She has all the red ones.
2) Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing three red marbles, three green ones, two white ones, and one purple one. She grabs five of them. Find the probability of the following event, expressing it as a fraction in lowest terms.
She has at most one green one.
Explanation / Answer
total number of marbles = 4 + 5 + 4 + 3
= 16 marbles
total red marbles = 4
she grabs 8 of them
probability = 4C4 * 12C4 / 16C8
= 495/12870
reducing to lowest terms = 1/26
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