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Number of ways in which the person can pick three balls out of 15 balls = ¹⁵C₃ = 455 Number of ways of picking 3 balls of same colour = ⁴C₃ + ⁵C₃ + ⁶C₃ = 4 + 10 + 20 = 34 Probability of picking three balls of same colour = 34 / 455 Required probability = 1 – Probability of picking three balls of same colour = 1 – 34/455 = 421/455
The sequence of folding a piece of paper and the manner in which the folded paper has been cut is shown in the figures below. How would the paper look w...
Statement. To maintain the structure of the Taj Mahal, a revival of Yamuna river is necessary.
Choose one of the following options.
A....
If P@Q means P is the father of Q, P*Q means P is the brother of Q, P%Q means P is the mother of Q and P$Q means P is the daughter of Q, then in M % I $...
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
CALANDER is coded in a code as CLANAEDR. Find the code for CIRCULAR under the same rule.
Select the correct option that indicates the arrangement of the following words in a logical and meaningful order.
1. Pentagon
2. Decagon<...
A, B, C, D, E, F, G and H are sitting around a square table facing the centre of the table. Four of them are sitting at each of the corners, while the o...
Three of the following four letter-clusters are alike in a certain way and one is different.
Pick the odd one out.
In a certain code language
A + B means ‘A is the brother of B’
A – B means ‘A is the father of B’
A × B means ‘A is ...
The average weight of A, B and C is 60 kg. If the average weight of A and B is 55 kg and the average weight of B and C is 58 kg, then what is the weight...
