Two hats are picked at random, what is the probability that one is blue and one is yellow?
Total number of hats = 6 + 4 + 2 + 4 = 16 Let S be the sample space. Then, n(S) = number of ways of drawing 2 hats out of 16 = ¹⁶C_2 = (16 × 15 )/(2 × 1) = 120 Let E= event of drawing two hats so that one is blue and one is yellow. n(E) = ⁴C_1×⁴C_1 = 4 × 4 = 16 ∴ P (E) = (n(E))/(n(S)) = 16/120 = 2/15
The _________ property of the element is a whole number.
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Which of the following elements is a noble gas?
What is the normal pH range of human blood?
Iron, Nickel and Cobalt are the examples of
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Which of the following pollutants is the major contributor to photochemical smog?
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_____________ has the maximum attraction force between the molecules.
