SOLUTION: 1.In a shipment of 50 DVD players, 2 are defective. If 30 players are picked at random, what is the probability that none is defcetive? 2.A shop has 12 flavours of lollipop. The

Question 32386: 1.In a shipment of 50 DVD players, 2 are defective. If 30 players are picked at random, what is the probability that none is defcetive?
2.A shop has 12 flavours of lollipop. The shopkeeper sells the lollipops in packets of three, each packet containing 3 flavours. How many different packets are possible?
3. If 2 cards are drawn at random from a regular deck of 52 cards without replacement, what is the probability that both cvards are aces
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
#1 P(player is not defective)= 48/50
You did't say if the players were selected with replacement.
I am assuming they were replaced.
P(30 selections are made and none is defective)= (48/50)^30=0.29..
Now I am assuming they were not replaced:
[48C30]/[50C30] = 0.155....
#2 12C3 = [12*11*10]/[1*2*3]= 220
#3 [4C2]/[52C2]= [(4*3)(1*2)]/[(52*51)/(1*2)]= 6/1326=0.0045...
Cheers,
Stan H.
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