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I have come across this sentence in a CNN report. "We can't smell them because we have a measly five million sensors in our noses, but dogs have up to 300 million sensors in their noses."

"...a measly five million sensors..." ?

When can we use the article "a" before a plural noun? Could this be a mistake?

marked as duplicate by ab2 ReinstateMonicaNow, user140086, Andrew Leach May 27 '16 at 9:17

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