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Omni-MATH / Let x₁,…,x₁₀₀ be defined so that for each i,x_(i) is a (uniformly) random integer between 1 and 6 inclusive. Find the expected number of integers in the set …

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problem

Let x1,…,x100x_{1}, \ldots, x_{100} be defined so that for each i,xii, x_{i} is a (uniformly) random integer between 1 and 6 inclusive. Find the expected number of integers in the set {x1,x1+x2,…,x1+x2+…+x100}\{x_{1}, x_{1}+x_{2}, \ldots, x_{1}+x_{2}+\ldots+x_{100}\} that are multiples of 6.
Plain-text mathematical notation (without MathML)
Let x₁,…,x₁₀₀ be defined so that for each i,x_(i) is a (uniformly) random integer between 1 and 6 inclusive. Find the expected number of integers in the set {x₁,x₁+x₂,…,x₁+x₂+…+x₁₀₀} that are multiples of 6.
Original LaTeX notation
Let $x_{1}, \ldots, x_{100}$ be defined so that for each $i, x_{i}$ is a (uniformly) random integer between 1 and 6 inclusive. Find the expected number of integers in the set $\{x_{1}, x_{1}+x_{2}, \ldots, x_{1}+x_{2}+\ldots+x_{100}\}$ that are multiples of 6.

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