an urn contains 5 balls and an unknown number of red balls.two balls are drawn at random.if the probability of both of them being blue is 5/14.Find no. of red balls

Dear Student,

Refer the first solution of the following link:
https://www.meritnation.com/ask-answer/question/1-an-urn-contains-5-blue-and-an-unknown-number-x-of-red-b/math/3439555

Hope this information will clear your doubts about the topic.                                                                                            

If you have any more doubts, just ask here on the forum and our expert will try to help you out as soon as possible.                                                                                                      

Regards