Question
An urn contains 3 green, 5 blue, 6 black and 4 yellow
marbles. Quantity I – If two marbles are picked at random, what is the probability that both are green? Quantity II – If three marbles are picked at random, what is the probability that two are blue and one is yellow? In each of the following questions, read the following questions, read the given statements and compare given two quantities on its basis:Solution
Quantity I : Total no. of marbles in the urn = 3 + 5 + 6 + 4 = 18 P(S) = ¹⁸C₂ = (18 ×17 )/(2 × 1) = 153 P(E) = ³C₂ = 3 ∴ Required probability = 3/153 = 1/51 Quantity II : Total no. of marbles in the urn = 3 + 5 + 6 + 4 = 18 P(S) = ¹⁸C₃ = (18 ×17 ×16 )/(3 × 2 × 1) = 816 P(E) = ⁵C₂ × ⁴C₁ = (5 × 4)/2 × 4 = 40 ∴ Required probability = 40/816 = 5/102 ∴ Quantity I < Quantity II.
Select the most appropriate meaning of the given idiom.
At your beck and call
Choose the option which best expresses the meaning of the idiom/phrase in bold in the sentence.
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Foam at the Mouth
an idea that is based on feeling and for which there is no proof
Fill in the blank given below using the correct idiom.
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- In each of the following questions, an idiomatic expression or a proverb has been given in bold . Choose the option that best expresses its meaning.
In each of the following questions, an idiomatic expression/a proverb has been highlighted– followed by four alternatives. Choose the one which best ...
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