In a discount store, 12% of the 100 cups in stock have some unnoticeable defect. What is the probability of buying 12 cups that don’t have any defect? And what is the probability of getting all 12 cups having a defect?
I really need help
+128406 Probability of buying 12 cups that don't have any defect is
88/100 * 87/99 * 86/98 * 85/97* 84/96 * 83/95 * 82/94 * 81/93 * 80/92 * 79/91 * 78/90 * 77/89 ≈
.1955 ≈ 19.6%
Probability of buying all 12 of the defective cups =
12/100 * 11/99 * 10/98 * 9/97 * 8/96 * 7/95 * 6/94 * 5/93 * 4/92 * 3/91 * 2/90 * 1/89 =
1
__________________ ≈ [ very little chance!!! ]
1050421051106700
