SOLUTION: HI, i need help with this problem: A new shipment of 9 VCRs, which will be offered at a very low price, are delivered to a store. Unknow to the manager, 4 of the VCRs are defect

Question 65372: HI, i need help with this problem:
A new shipment of 9 VCRs, which will be offered at a very low price, are delivered to a store. Unknow to the manager, 4 of the VCRs are defective.
Determine the probability that at least one of the first 3 VCRs sold is defective. Express your answer to the nearest tenth of one percent.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A new shipment of 9 VCRs, which will be offered at a very low price, are delivered to a store. Unknow to the manager, 4 of the VCRs are defective.
Determine the probability that at least one of the first 3 VCRs sold is defective. Express your answer to the nearest tenth of one percent.
---------------
P(at least one defective) = 1 - P(none defective)
# of ways to choose 3 that are not defective is 5C3
# of ways to choose 3 of any kind out of nine is 9C3
=1 - 5C3/9C3
=1 - (5/9)(4/8)(3/7)
=1- 0.119047...
=0.8809...

Cheers,
Stan H.

RELATED QUESTIONS
HI, i need help with this problem: A new shipment of 9 VCRs, which will be offered at a (answered by Edwin McCravy)

Sometimes stores offen incredibly good prices on a product to encourage people to shop at (answered by stanbon)

Could you please help me with this problem? I do not understand how to find the... (answered by dabanfield)

I need help with this word problem, please help thanks! A quality control inspector... (answered by ewatrrr)

If someone could show me how to get started - I would so greatful! Here is the whole... (answered by stanbon)

I have many word problems to solve that are similar to this one, but I need help with the (answered by ankor@dixie-net.com)

Hi, Can someone please help me with these problems. I've tried to solve them and having... (answered by aka042)

Hi. I need assistance with this geometry problem, preferably within a few hours (which is (answered by josgarithmetic)

This is an Extra Credit problem, NOT from a textbook. A power company is going to... (answered by ankor@dixie-net.com)