On Sunday, Kayla spends $3.50 on cofee and buys two donuts, then on Monday she spends $1.25 on coffee and buys five donuts. How
1 answer:
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Answer:
5 different numbers, 2 even
Step-by-step explanation:
Since we have 5 digits and they are non repeating we can use the permutation formula:
It gives us the amount of ways to arrange k objects out of n objects without repetition, but order does matter.
In our case the amount of 4 digit numbers that can be formed using the digits from 1 to 5 is:
And out of those 5, only 2 are even