Question
A bag contains 20 white and some black balls. If the
probability of drawing a black ball from the bag is 2.5 times that of drawing a white ball, find the number of black balls in the bag.Solution
Given, Number of white balls = 20 Let x be the number of black balls. Total number of balls in the bag = 20 + x Also, the probability of drawing a black ball from the bag is 2.5 times that of drawing a white ball. ⇒ x/(20 + x) = 2.5[20/(20 + x)] ⇒ x = 50 Hence, the number of black balls in the bag = 50.
Rajasthan literature festival 2023 was started in ________ during March 2023.
Nowshera Folk Festival is been celebrated to promote tourism in which state/ut recently?
The Government of India has added _____ number of new Ramsar Sites as declared by the Union Minister of Environment, Forest and Climate Change, Bhupende...
What illegal trading practice involves fund managers placing orders ahead of large trades to profit from expected price changes?
Gorakhpur district of Uttar Pradesh is situated on the bank of river?
What is the primary objective of the HaRBInger 2024 hackathon hosted by APIX and RBI?
RBI’s bank Note Press is located in _____________.
What is the state animal of Uttar Pradesh?
 When is International Mind- Bond Wellness Day celebrated?
Recently a campaign ‘Good for You and Good For the Planet’ has just begun, who has started this campaign?
Relevant for Exams:
