Can someone please explain to me where my teacher got the -3x - 15y = -135 from? I understand how to do this but I have no idea
how she got those numbers.
1 answer:
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So you have 8 digits (number available) to form 3 digit numbers (number selected).
Using the formula
where a is the number of available digits, P is the permutation function and c is the number of digits to be selected.
The number of three digit numbers that can be formed =
= 336
<span> O R
</span>By using the formula
where a is the number of available digits and c is the number of digits to be selected.<span>
</span>⇒
<span>
</span>⇒
<span>
</span>⇒ Permutation = 336<span>
</span>
Using the formula
The number of three digit numbers that can be formed =
= 336
<span> O R
</span>By using the formula
</span>⇒
<span>
</span>⇒
<span>
</span>⇒ Permutation = 336<span>
</span>