1.

how many 5 digit telephone number 9can be constucted using digi 0 to 9 if each number start with 67 and no digit appears more than once

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I am SORRY ,I can'tStep-by-step EXPLANATION:एम सॉरी आई कांट गिव द आंसर ऑफ दिस क्वेश्चन



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