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
        

In a bag there are 5 red balls, 3 white balls and 4 black balls. Four balls are drawn from the bag. Find the number of ways of in which at most 3 red balls are selected.

-> I would like to know should we assume 5 red ball are identical or different? As this is not explicitly specified in this question. Please suggest.

one month ago

Answers : (3)

Vikas TU
10070 Points
							
Dear student 
If it is not specified , you should assume it as identical ball. 
Hope this will help
Good Luck 
Cheers 
one month ago
Rakhi Jain
25 Points
							
Thanks you sir.
This question appeared in this year JEE mains(8th JAn morning shift).
If we assume all 5 red balls are identical. Likewise all 3 white balls are identical and so for black ball.
Answer should be = 12.
However, if we dont assume balls to be identical, answer would be 490. Which is given as correct answer as per JEE mains site answer key. 
 
I am confused should I challenge this question. Please suggest.
one month ago
Vikas TU
10070 Points
							
Dear Rakhi 
Consult your teacher , 
I think yu should challenge . 
Because nothing is mentioned in the question , 
And you have right to know proper explanation about questions.
Good Luck 
one month 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

  • 731 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