Question
A bag contains 6 red balls, 4 green balls, and 5 orange
balls. If three balls are drawn at random from the bag, what is the probability that all three balls are either red or orange?Solution
Total probability = 15C3[: Total balls = 15] =15! /3! ×12! =35×13=455 Subsequent probability = order of choosing all three balls either red or orange = 6C3+5C3 = (6! /3! ×3!) +(5! /3! ×2!) =20+10=30 Hence probability =30/455 =6/91.
If A ÷ B means that A is the brother of B, A × B means that A is the sister of B, A – B means that A is the father of B then which of the following ...
If (A # B) means A is son of B, (A & B) means A is mother of B, (A @ B) means A is father of B, (A $ B) means A is sister of B. If F # G $ H @ I & J $ K...
If R ÷ S + T + U, which of the following is true?
Statements : I = E, Q ≥ A > O, I ≥ Q
Conclusions : I. E ≥ O II. A < E
Answer the following question based on the direction given below.
If 'A$B' means 'A is son of B'
'A%B' means 'A is daughter of B'
'...
Answer the questions based on the information given below.
L + M means L is the wife of M.
L ? M means L is the son of M.
L > M m...
A + B means ‘A is the father of B’
A – B means ‘A is the mother of B’
A % B means ‘A is the brother of B’
A # B m...
If (A @ B) means A is son of B, (A # B) means A is father of B, (A & B) means A is mother of B, (A $ B) means A is brother of B. If G @ H&I # J $ K@ L, ...
'A # B' means 'A is the mother of B'.
'A @ B' means 'A is the daughter of B'.
'A & B' means 'B is the husband of A'.
'A % B' means ...
If X & Y means X is married to Y, X ^ Y means X is father of Y, X @ Y means X is mother of Y, X % Y means X is sister of Y. If 'H & I ^ J % K @ L % M' i...
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