Question
Bag P contains 2 red balls and 2 blue balls, whereas bag
Q contains 2 red balls and 2 blue balls. One ball is drawn at random from P and transferred into Q. Two balls are now drawn at random from Q. Find the probability that both balls are of different colours.Solution
Required probability
= (2/4) X 2 X (3/5) X (2/4) + (2/4) X 2 X (2/5) X (3/4) = (1/2) X (12/20) + (1/2) X (12/20) = (12/40) + (12/40) = (24/40) = (3/5)
- Who is mother of sister of U?
Who is the daughter-in-law of A?
Dharun has a brother Anand. Dharun is the son of Kumar. Krishnan is Kumar's father. How is Anand related to Krishnan?
If A + B means B is father of A and A % B means A is brother of B, A # B means B is husband of A. Which of the following shows that M is daughter in law...
If,
‘T + S’ means that T is the father of S,
‘T X S’ means that T is the mother of S,
‘T - S’ means ‘T’ is the wif...
Answer the questions based on the information given below:
There are seven members D, E, F, G, H, I, and J in a family of three generation. E...
‘ A + B ’ means ‘A is the sister of B’
‘ A = B ’ means ‘A is the daughter of B’
‘ A # B ’ means ‘A is the son o...
Answer the questions based on the information given below.
Seven persons (S, T, U, V, W, Y and Z) belong to a family of three generations. No...
How is L related to K?
A + B means B is brother of A.
A - B means A is mother of B.
A x B means A is father of B.
A ÷ B means A is son of B.
