|
Question 353799: Off 12 eggs in a refrigerator, 2 are bad. From these, 4 eggs are chosen at random to make a cake. What are the probabilities that?
a. Exactly one is bad.
b. At least one is bad.
Answer by sudhanshu_kmr(1152)   (Show Source):
You can put this solution on YOUR website! 2 bad, 10 good eggs
No. of ways to choose 4 eggs from total 12 = 12C4
A.:
No. of ways to choose exactly one bad = 2C1 * 10C3 = 240
probability of exactly one bad = 240 / 495
B.: No. of ways to choose all 4 good eggs = 10C4 = 210
probability of all eggs are good = 210/495
so, now probability of at least one bad among 4 = 1 - 210/495
= 285 /495
Sometimes there may be typing mistake in solution of a problem, so please ignore it. Understand the concept and try the problem yourself. If there is problem related to concept, contact at
sudhanshu.cochin@gmail.com
Best of luck.......
|
|
|
| |
