Question

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

Answer 1

90 choose 4 / 100 choose 4 = 0.651630549

Answer 2

ok that was wrong

Answer 3

^ choosing 4, not 5 mang

Answer 4

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

Answer 5

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

Answer 6

yeah wrong twice!