How many five digit telephone numbers can be constructed using the digits between 0 to 9. If each numbers start with 67 and no digits appears more than once
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let number be - - - - -
starts with 67 then 67- - -
remaining threee palces can be filled witn 0,1,2,3,4,5,8,9 i.e.,8 values
3rd place = 8 values
4th place = 7 values
5th place = 6values
so answer is 8*7*6 = 336
Step-by-step explanation:
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