## anonymous 4 years ago can some one help me with this question. Four microprocessors are randomly selected from a lot of 100 microprocessors among which 10 are defective. Find the probability of obtaining no defective microprocessors

1. anonymous

90 choose 4 / 100 choose 4 = 0.651630549

2. anonymous

ok that was wrong

3. anonymous

^ choosing 4, not 5 mang

4. anonymous

no doubt the same thing marine wrote, but my original answer was wrong

5. anonymous

$\frac{90}{100}\times \frac{89}{99}\times \frac{88}{98}\times \frac{87}{97}$

6. anonymous

yeah wrong twice!