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According to the given formula above, how many productions should be there ?

S-->aAbB

A-->aA | a

B-->bB | b

According to me., it should be 17 but in the book answer is 9, can anyone tell me how?

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edited | 70 views
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The formula is not clearly visible. Can you post a sharper image or better if you write the formula.
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I have changed the image.
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they are the maximum limit , not exact limit
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OK.. Thanks ☺