20 speak Spanish and 10 speak both Spanish and French. How many speak at least one of these two languages ?

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In a committee, 50 people speak French, 20 speak Spanish and 10 speak both Spanish and French. How many speak at least one of these two languages ?
13
Oct
In a committee, 50 people speak French, 20 speak Spanish and 10 speak both Spanish and French. How many speak at least one of these two languages ? 20 speak Spanish and 10 speak both Spanish and French. How many speak at least one of these two languages ? 50 people speak French In a [...]
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