kmart4162 kmart4162

04-11-2022
Mathematics

Answered

In a class of 80 students, 50 students know english, 55 know french and 46 know german language. 37 students know english and french, 28 students know french and german, 25 students know english and german and 7 students know none of the languages. find out (a) how many students know all the 3 languages?

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