有17名外交官,他们至少会英语和法语中的一种,其中12人会英语,有8人会法语。这
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有17名外交官,他们至少会英语和法语中的一种,其中12人会英语,有8人会法语。 即会英语又会法语多少人？
12人+8人-17人=3人
There are 17 diplomats, at least one of them in English and French, of which 12 are in English, and 8 speak French. How many people can speak English and French?
12 people -17 people =3 people +8
12人+8人-17人=3人
There are 17 diplomats, at least one of them in English and French, of which 12 are in English, and 8 speak French. How many people can speak English and French?
12 people -17 people =3 people +8
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