CBSE Class 12-science Maths Introduction to Conditional Probability

• Q27 Check In an experiment, 2 balls are drawn containing 4 red balls and 6 black balls. Let X be the number of red balls selected. Complete the table below: Outcome overline P(X) XP(X)
  
• the question and the solution is in the attachment, can you explain how can they use combinations when combinations does not account for replacement while it is mentioned in the question that replacement is to be taken into account? And can you provide the correct answer.
  
• Assuming the probability of a male birth as 1/2, find the probability that a family of 3 children will have: a) two boys and one girl b) at most two girls 
• Plz answer 8 b part
  
• 20th sum plz
  
• 14th sum and plz explain its statement
  
• 21st sum plz
  
• four digit numbers are formed by using the digit 1,2,3,4 and 5 without repppearing any digit. Find the probability that a number chosen at random is an odd number
• Define conditional probability
• If A and B are two events such that P(A) = 0.4, P(B) = 0.55 and = 0.7. Then find P(A | B) and P(B | A). 

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