How many 5 digit telephone numbers can ...

How many 5 digit telephone numbers can be constructed using the digits 0 to 9, if starts with 67 and no digit appears more than once ?

A

335

B

336

C

338

D

337

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The correct Answer is:

B

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How many 5 digit telephone numbers can be constructed using the digits 0 to 9, if each number starts with 67 and no digit appears more than once ?

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