There is a 7-digit telephone number with all different digits. If the – McqOptions

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1.	There is a 7-digit telephone number with all different digits. If the digit at extreme right and extreme left are 5 and 6 respectively, find how many such telephone number are possible ?
A.	120
B.	100000
C.	6720
D.	30240
E.	None of the above
Answer» D. 30240

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