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Question help the access code for a? car's security system consists of four digits. the first digit cannot be 9 and the last digit must be even. how many different codes are? available?

Respuesta :

musiclover10045

from 0-9 there are 10 digits

 1st one cannot be 9 so there are 9 digits available

last one needs to be even, there are 5 even numbers ( 0,2,4,6,8)

now multiply everything together

9 x 10 x 10 x 5 = 4,500 different combinations

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