$\"\"$

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A bag placed in $\"\"$ red tiles, $\"\"$ blue tiles, $\"\"$ green tiles, $\"\"$ yellow tiles and $\"\"$ black tiles.

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Find the probability of not blue tiles.

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The total number of tiles are $\"\"$ .

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The probability of selecting one tile from the total number of tiles are $\"\"$ .

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$\"\"$ .

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The probability of selecting blue tiles are $\"\"$ .

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$\"\"$ .

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The probabity is $\"\"$ .

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

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$\"\"$ .

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Probability of not blue is $\"\"$ .

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

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$\"\"$ (Simplify)

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The probability of not blue tiles is $\"\"$ . $\"\"$

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The probability of not blue tiles is $\"\"$ .