badminton shuttlecock feather
Probability- items from a bag?
A grade 9 class playing badminton in the gym didn't clean up very well after they were done. When the janitor swept up, there were 12 feathered shuttlecocks and 9 plastic shuttlecocks in the pile. They were put in a bag to show to the class the next day. if the 2 shuttlecocks were pulled out of the bag without replacement, determine the probability of the following:
a) 1 plastic and then one feathered shuttlecock
b) 1 plastic and one feathered shuttlecock
c) at least one plastic shuttlecock.
The question is a little confusing to me. Not sure where to begin 
Thanks!
the possibility of just choosing two shuttlecocks out of the bag:
C(21,2)=210
a) you first have to choose one of 9,and then one of 12.it means half the probability of the second part of the question. (because when you choose one plastic and one feathered,there are 2 possibilities:1.u choose the plastic first,2.u choose the feathered one first.so picking the plastic one first has half the possibility of choosing without an order):
C(9,1)*C(12,1)/2
C(9,1)=9 C(12,1)=12 c(9,1)*c(12,1)/2=54
possibility:54/210=9/35
b) twice the possibility of the first one: 2* 9/35 =18/35
c) it means you have to add two possibilities: 1.you pick one plastic and one feathered shuttlecock. 2.you pick TWO plastic shuttlecocks.
1.it's the same as part b.=18/35
2.c(9,2)/54=36/210=6/35
1+2 = 18/35 + 6/35 = 24/35
 |
 |
1pc LED Badminton Feather Shuttlecock flash Light New |  |
0 Bid | US $.99 | 2h 43m |
 |
2 Dazen-Duck feather Badminton Shuttlecock Boer-506 | |
0 Bid | US $5.69 | 14h 24m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.99 | 4h 57m |
 |
LED Badminton Feather Shuttlecock Birdies Shuttlecocks | |
 |
US $11.98 | 13d 7h 29m |
 |
6 Pcs Shuttlecock White Feather Badminton Balls Game | |
0 Bid | US $.99 | 11h 28m |
 |
5 Dazen-duck feather Badminton Shuttlecock Boer-504 | |
0 Bid | US $9.99 | 1h 19m |
 |
6 Pcs Shuttlecock White Feather Badminton Balls Game | |
0 Bid | US $.99 | 1d 7h 34m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.90 | 1d 11h 24m |
 |
6 Pcs Shuttlecock White Feather Badminton Balls Game | |
0 Bid | US $.99 | 2d 6h 55m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.90 | 2d 11h 24m |
 |
1 Doz. Badminton Shuttlecock Dazen-duck Feather N6 | |
0 Bid | US $.99 | 3d 18h 33m |
 |
1 Doz. Badminton Shuttlecock Dazen-duck Feather N8 | |
0 Bid | US $9.99 | 3d 23h 19m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.99 | 1d 5h 30m |
 |
4 Dazen-duck feather Badminton Shuttlecock Boer-501 | |
0 Bid | US $9.99 | 4d 6h 20m |
 |
2 Dazen-Duck feather Badminton Shuttlecock Boer-506 | |
0 Bid | US $5.69 | 4d 6h 24m |
 |
4 Dazen-Duck feather Badminton Shuttlecock Boer-503 | |
0 Bid | US $15.20 | 4d 6h 48m |
 |
BADMINTON SHUTTLECOCK GOOSE FEATHER AND NET | |
0 Bid | US $9.10 | 4d 10h 12m |
 |
6 Pcs Shuttlecock White Feather Badminton Balls Game | |
0 Bid | US $.99 | 3d 7h 21m |
 |
5 Dozen-Goose feather Badminton Shuttlecock DHS 402 | |
0 Bid | US $9.99 | 4d 21h 54m |
 |
4 Dazen-duck feather Badminton Shuttlecock Boer-501 | |
0 Bid | US $9.99 | 4d 22h 34m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.99 | 2d 3h 26m |
 |
1 Doz. Badminton Shuttlecock Dazen-duck Feather N8 | |
0 Bid | US $9.99 | 5d 1h 30m |
 |
5 Dozen-Goose feather Badminton Shuttlecock DHS 402 | |
0 Bid | US $9.99 | 5d 3h 44m |
 |
1 Doz. Badminton Shuttlecock Dazen-duck Feather N8 | |
|
US $18.25 | 5d 3h 52m |
 |
5 Dazen-duck feather Badminton Shuttlecock Boer-504 | |
0 Bid | US $9.99 | 3d 1h 24m |
 |
LED Badminton Feather Shuttlecock Birdies Shuttlecocks | |
|
US $.99 | 25d 4h 43m |
 |
5 Dozen-Goose feather Badminton Shuttlecock DHS 402 | |
0 Bid | US $9.99 | 5d 7h 44m |
 |
6 Pcs Shuttlecock White Feather Badminton Balls Game | |
0 Bid | US $.99 | 4d 7h 35m |
 |
2 DOZ RSL CLASSIC TOURNEY BADMINTON FEATHER SHUTTLECOCK | |
|
US $36.00 | 11d 19h 35m |
 |
Dozen LED Badminton Feather Shuttlecock Shuttlecocks | |
|
US $19.99 | 13d 7h 29m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.99 | 3d 3h 26m |
 |
100% GOOSE feather badminton shuttlecock Eq: Yonex 30 | |
|
US $11.99 | 2d 1h 51m |
 |
6 Pcs Shuttlecock White Feather Badminton Balls Game | |
0 Bid | US $.99 | 5d 12h 16m |
 |
2 DOZ RSL TOURNEY NO.4 BADMINTON FEATHER SHUTTLECOCK | |
|
US $24.00 | 19d 20h 48m |
 |
1 Doz. Badminton Shuttlecock Dazen-duck Feather N6 | |
0 Bid | US $.99 | 6d 18h 54m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.99 | 4d 5h 7m |
 |
6 Pcs Shuttlecock White Feather Badminton Balls Game | |
0 Bid | US $.99 | 6d 9h 6m |
 |
72 DHS 402 Goose feather Badminton Shuttlecock new | |
|
US $16.99 | 16d 1h 32m |
 |
12 pcs Competition Badminton Goose Feather Shuttlecock | |
|
US $11.98 | 17d 2h 36m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.99 | 5d 10h 41m |
 |
4 LED Badminton Feather Shuttlecock Birdies flash Light | |
|
US $8.10 | 22d 7h 59m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.99 | 6d 4h 54m |
 |
3 Pcs White Feather Shuttlecock Badminton Balls Game | |
0 Bid | US $.90 | 6d 11h 26m |
 |
1 Doz Badminton Shuttlecock Profession Goose Feather B | |
|
US $9.99 | 8h 57m |
 |
1pc LED Badminton Feather Shuttlecock flash Light New | |
|
US $.99 | 14d 4h 51m |
| Powered by phpBay Pro |
 |
GOGO™ Badminton Shuttlecocks # BS01, Premium A Grade Feather Shuttlecocks - Doze Pack List Price: $20.23 Sale Price: $8.99 Average Rating:   |
|
GOGO BS01 badminton feather shuttlecock used for club training, basic professional training or conventional competition. Speed 77 for medium speed. Premium A grade feather shuttlecocks contributing to make excellent performance... |
 |
Victor Gold Feather Tournament Shuttlecocks-1 Dozen Tube Sale Price: $17.98 Average Rating:  |
|
The feather shuttlecocks preferred by tournament players |
 |
DHS Badminton Shuttlecocks # BO402A 6-Pack, Goose Feather Shuttlecock, Shuttlecocks List Price: $11.93 Sale Price: $7.99 Average Rating:  |
|
The DHS 402A shuttlecocks is made of C grade goose feather and normally used for amateur training, family playing or entertainment.Product features: Choose C Grade goose featherTargeted for usage in outdoor playingGood choice for beginnerC... |
Li-Ning Phoenix Replaceable Feather Shuttlecock
Where to buy badminton shuttlecocks in Boston area?
I need to buy badminton shuttlecocks (hopefully made by feather). Does anybody know where to buy in Boston area? I live in cambridge.
Also, recommendation a couple of online sites to buy. Thanks.
do to scheels or dicks sporting goods.
