Sarthaks APP
0 votes
755 views
in Mathematics by (8.0k points)
A bag contains 6 red balls and some blue balls. If the probability of drawing a blue ball the bag is twice that of a red ball, find the number of blue balls in the bag.

1 Answer

0 votes
by (13.1k points)
selected by
 
Best answer
No of red balls = 6

Let no. of blue balls = x

Total no. of possible outcomes = 6 + x(total no. of balls)

P(E) = (No.of favorable outcomes)/(Total no.of possible outcomes)

P(blue ball) = 2 P(red ball)

⇒x /(x+6) = 2(6)/(x+6)

⇒ x = 2(6)

x = 12

∴ No of blue balls = 12

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...