Question
Download Solution PDFA bag contains 4 red balls and 5 blue balls. Two balls are drawn at random without replacement. If the first ball drawn is blue, what is the probability the second ball is also blue?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
If S is a sample space and A is a favourable event then the probability of A is given by:
\(\rm P(E)=\dfrac{n(A)}{n(S)}\)
Calculation:
Total balls in bag = 4 + 5 = 9 balls
Given: Two balls are drawn at random without replacement
After the first ball is drawn and found to be blue, there are now 8 balls left in the bag, 4 of which are blue.
Probability the second ball is blue = \(\frac 4 8 = \frac 1 2\)
Last updated on Jul 1, 2025
-> The Indian Army has released the Exam Date for Indian Army Havildar SAC (Surveyor Automated Cartographer).
->The Exam will be held on 9th July 2025.
-> Interested candidates had applied online from 13th March to 25th April 2025.
-> Candidates within the age of 25 years having specific education qualifications are eligible to apply for the exam.
-> The candidates must go through the Indian Army Havildar SAC Eligibility Criteria to know about the required qualification in detail.