Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
A box contains b red balls 2b white 3b blue balls $ b>0
3 balls are selected without replacement if A is the event that no two of the selected balls have same colour then
1) no value of b for which P(A)= 0.3
2) one value of b for which P(A)= 0.3 and this value is less than 10
3) two values of b and this value is greater than 10
4) None
Dear Mayank
3 balls are selected without replacement if no two of the selected balls have same colour then
= bC1 * 2bC1 *3bC1
Probability P =[ bC1 * 2bC1 *3bC1 ]/6bC3
=6b2 /(6b-1)(6b-2)
for P = 0.3
6b2 /(6b-1)(6b-2) =0.3
8b2 -9b +1 =0
b=1 and b =1/8
b can not be 1/8
so only one value of b =1
option b is correct
Please feel free to post as many doubts on our discussion forum as you can.If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation.All the best. Regards,Askiitians ExpertsBadiuddin
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !