Let $ A = \{ x, y, z, u \} $ and $ B = \{ a, b \} $. A function $ f : A \rightarrow B $ is selected randomly. The probability that the function is an onto function is - DASH

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Question

Let $ A = \{ x, y, z, u \} $ and $ B = \{ a, b \} $. A function $ f : A \rightarrow B $ is selected randomly. The probability that the function is an onto function is

$\frac{5}{8}$

$\frac{1}{35}$

$\frac{7}{8}$

$\frac{1}{8}$

Solution

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