Question
A bag contains 10 white and some black balls. If the
probability of drawing a black ball from the bag is 2 times that of drawing a white ball, find the number of black balls in the bag.Solution
Given, Number of white balls = 10 Let x be the number of black balls. Total number of balls in the bag = 10 + x Also, the probability of drawing a black ball from the bag is 1.8 times that of drawing a white ball. ⇒ x/(10 + x) = 2[10/(10 + x)] ⇒ x = 20 Hence, the number of black balls in the bag = 20.
What type of musical instrument is the 'Ravanhatha'?
In October 2022, which of the following political parties was allotted the 'two swords and shield' poll symbol by the election commission of India?
Bhagat Singh was sentenced to death because of
 A solution turns red litmus paper blue. Its Ph is likely to be
Which of the following dance is performed by Jasnath sect followers?
Who was the architect of atomic research in India?
Languriya Songs of Rajasthan are related to :
Finance commission is described in which article?
Parliamentary privileges are specified in
'Kamaicha' is a
Relevant for Exams:
