$\"\"$

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

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Find the probability of red or orange 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 red chip is $\"\"$ .

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Hence, $\"\"$ .

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

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Hence, $\"\"$ .

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The total number of ways of selecting red or orange 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 selecting red or orange chip is $\"\"$ . $\"\"$

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The probability of selecting red or orange chip is $\"\"$ .