7 are white (not spotty)
45% are spotty.
45% spotty means 55% are not spotty.
So, if the only not spotty methane makers are the seven white ones:
.55x = 7;
x=13
Lounge
annoying conundrum
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7 are white (not spotty)
45% are spotty.
45% spotty means 55% are not spotty.
So, if the only not spotty methane makers are the seven white ones:
.55x = 7;
x=13