To use an automated teller machine, you generally must enter a four-digit code, using the digits 0-9. How many four-digit codes are possible if repetition of digits is Not permitted?

c

step-by-step explanation:

c

7,24

step-by-step explanation:

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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