$\"\"$

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A bowl contains $\"\"$ red chips, $\"\"$ green chips, $\"\"$ yellow chips, and $\"\"$ orange chips.

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Find the probability of yellow or green chip.

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The total number of chips is $\"\"$ .

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The number of ways of selecting one chip from the total number of chips is $\"\"$ .

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Hence, $\"\"$ .

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The number of ways of selecting one yellow chip is $\"\"$ .

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Hence, $\"\"$ .

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The number of ways of selecting one green chip is $\"\"$ .

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Hence, $\"\"$ .

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The total probability of yellow or green is $\"\"$ .

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$\"\"$ .

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The probabity is $\"\"$ .

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$\"\"$ (Substitute $\"\"$ and $\"\"$ )

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The probability of yellow or green chip is $\"\"$ . $\"\"$

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The probability of yellow or green chip is $\"\"$ .