MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 12
        


four balls are there

i pick up two balls out of them

two of them are white

what is the probability that all of them are white?

8 years ago

Answers : (5)

SAGAR SINGH - IIT DELHI
879 Points
							

Dear student,

Required probabilty=2/4=1/2

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..

 

Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

8 years ago
vikas askiitian expert
509 Points
							

total balls = 4

white balls = 2

probablity that  white ball is taken out = 2/4= 1/2

now only 1 white ball is remaining

total balls = 3

probablity that white ball is taken out = 1/3

total probablity = multiplication of both = 1/6

1/6 is the required ans

8 years ago
Mir Noaman Ali IIT-Roorkee
57 Points
							

probability = favourable /total cases   in this case favourable case is choosing 2 white out of 4 white nd total is choosing 2 white out of 2white nd 2 of sum oder colour + choosing 2 white out of 3white and 1 of sum oder colour nd choosing 2 white out of 4 white hence 4c2 / (4c2 + 3c2 + 2c2) calculating it we get 6/11  approve the answer if u have understood the solution 

8 years ago
Mir Noaman Ali IIT-Roorkee
57 Points
							

probability = favourable /total cases   in this case favourable case is choosing 2 white out of 4 white nd total is choosing 2 white out of 2white nd 2 of sum oder colour + choosing 2 white out of 3white and 1 of sum oder colour nd choosing 2 white out of 4 white hence 4c2 / (4c2 + 3c2 + 2c2) calculating it we get 6/10 = 3/5   approve the answer if u have understood the solution ..............

8 years ago
Sudheesh Singanamalla
114 Points
							

Number of balls = 4

number of balls picked = 2

colour of 2 balls picked = white

the probability that all of them are white is 1

because

1. all 4 could be white

2. 3 white , 1 of another colour

3. 2 white and 2 of one colour each

the number of white balls could be either 2 or 3 or all 4 of them !

so probabilty that all of them are white is 1/2 or 3/4 or 1

since we get 2 white balls out of 2 balls we pick , the probabilty is 2/2 = 1

 

Please approve

8 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 101 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details