Question
A box contains 20 red and 15 white balls. The
probability of drawing two balls of the same colour is?Solution
Let S be the sample space. Then, n(S) = number of ways of drawing 2 balls out of 35 = 35C2 = (35 x 34)/(2 x 1) = 595 Let E= event of drawing 2 balls of the same colour n(E) = 20C2 + 15C2 = (20 x 19)/(2 x 1) + (15 x 14)/(2 x 1) = 190 + 91 = 281 Therefore, P(E) = (n(E))/(n(S)) = 281/595 ` `
How many fake mobile connections have been disconnected using the Sanchar Saathi platform as of 2025?
The Centre announced 939 police medals on the eve of the Republic Day 2022. The ___________ Police has bagged the highest number of medals.
Who was the Chairman of Hinduja Group and recently passed away in London?
Siachen Day is observed annually by the Indian Army on April 13 to commemorate Operation Meghdoot, which was launched in which year?
Which declaration was adopted at the 17th BRICS Summit held in Brazil in 2025?
In the book "Where the Madness Lies: Citizen Accounts of Identity and Nationalism" by Kishalay Bhattacharjee, what is the main focus of the author?
Under the 'Digi-Lakshmi' scheme launched by Andhra Pradesh, how many Common Service Centres (CSCs) will be set up across Urban Local Bodies (ULBs)?
PFRDA in coordination with SEBI has enabled the NPS subscribers to view their pension fund corpus along with their demat securities and MF holdings unde...
The Prof. V.K. Gokak Award will be presented to which writer in Bengaluru?
The semiconductor ATMP facility in Sanand has been established by which company?
