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ATQ, Let the number of 10 rupees coins in the piggy bank be 'p'. So, the number of 5 rupeees coins in the piggy bank = 0.7p And the number of 20 rupees coins in the piggy bank = 0.70/1.75 = 0.4p So, the total number of coins in the piggy bank = p + 0.7p + 0.4p = 2.1p So, the probability that a 5 rupees coins and a 10 rupees coins are drawn = pC1 × 0.7pC1/ 2.1pC2 = 1/3 (2p × 0.7p) / {2.1p (2.1p - 1) } = 1/3 2.1p - 1 = 2p 0.1p = 1, p = 10 So, the total number of coins in the piggy bank = 2.1 × 10 = 21
If ‘A ÷ B’ means ‘B is the brother of A’,
‘A × B’ means ‘B is the daughter of A’,
‘A @ B’ means ‘B is the wife of ...
A is the brother-in-law of B. B is the daughter of M who is the wife of G. J is the father of N. N is the only son-in-law of G. B is the daughter-in-law...
Which number will replace the question mark (?) in the following number series?
5, 7, 9, 11, 18, ?, 34, 35, 59, 67
Five words have been given, out of which four are alike in some manner and one is different.
Select the odd one.
M...
LCNT is related to NEPV in a certain way based on the English alphabetical order. In the same way, HBER is related to JDGT. To which of the following is...
Read the given statements and conclusions carefully. Decide which of the given conclusions is are true based on the statements.
Statements:
Arrange the following words according to English dictionary
1. Institution
2. Instruction
3. Insurrection
4. Insubordinate
5. Insufficient
Select the number that can replace the question mark (?) in the following series.
69, 109, 159, 219, 289, ?
Which of the following terms will replace the question mark (?) in the given series?
BCE, GHJ, LMO, QRT, ?
Select the following four options, the one that CANNOT be concluded from the given statements.
Statement 1: All coats are skirts
Stat...