Question

how many different three digit can be written using the digits 2,4,7 without repeating the digits what is the probability for even number

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Answer 1

Answer:

first-742

second-472

third-724

Answer 2

Answer:

n(s)=9,n(e)=5

Step-by-step explanation:

S={22,24,27,42,44,47,72,74,77}

n(s)=9

Even={24,42,44,72,74}

n(E)=5