Question
A box contains 6 red balls, 4 blue balls, and 5 green
balls. If two balls are drawn at random, what is the probability that one is red and the other is blue?Solution
Total balls = 6 + 4 + 5 = 15 Total ways to choose 2 balls = 15C2 = 105 Ways to choose 1 red and 1 blue = 6C1 × 4C1 = 6 × 4 = 24 Probability = 24/105 = 8/35 Correct answer: b)
If '+' means '×', '×' means '–', '–' means '÷' and '÷' means '+', then what will come in place of the (?) in the following equation?
9 + ...
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Assertion(A): The Portuguese were the fir...
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Three of the following words are alike in a certain manner and one is different. Select the odd word out.
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20, 25, 24, 30, 32, 35, ?
What should come in place of question mark (?) in the given series based on the English alphabetical order?
AYF, FUI, KQL, PMO, ?
5 is related to 27 by certain logic. Following the same logic, 7 is related to 51. To which of the following is 4 related, following the same logic?
...
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