<p>A student of mine offered tonight this cool solution.
Briefly:
The ratio of $1 to $2 bulbs is 2:1.
x - total number
$1<em>(2/3)</em>x + $2*(1/3)x = $600
x = $450</p>
<p>The last line should be
x = 450 bulbs.</p>
<p>A student of mine offered tonight this cool solution.
Briefly:
The ratio of $1 to $2 bulbs is 2:1.
x - total number
$1<em>(2/3)</em>x + $2*(1/3)x = $600
x = $450</p>
<p>The last line should be
x = 450 bulbs.</p>