At international conference 100 delegates spoke English,40 spoke french, 20 spoke both languages.How many delegates could speak at least one of these 2 languages?
2007-06-06 19:20:38 · 6 answers · asked by abc 1 in Science & Mathematics ➔ Mathematics
There is no indication of the total number of delegates or how many different languages are spoken.
100 + 40 - 20 = 120 speak at least one of the two languages. (The 20 are included in both the 100 and the 40, so must be subtracted from the sum of the two.)
2007-06-06 19:45:58 · answer #1 · answered by Helmut 7 · 0⤊ 0⤋
The total sample size is missing so 2 possibilities exist:
1) Let the total sample size be 100 so the answer to the question shall also ne 100.
OR
2) In absence of total no. of delegates the minimum no. of delegates that spoke shall be
100 + 40 - 20 = 120
2007-06-06 19:54:40 · answer #2 · answered by Monark S 1 · 0⤊ 0⤋
The number of delegates that could speak at least one of the 2 languages is the total number of delegates present.
2007-06-06 19:29:38 · answer #3 · answered by Trina C 2 · 0⤊ 0⤋
The answer = 100 (all of them could speak English: at least one language) +40 (they can speak at least one language: French) - 20 (they can speak both languages, BUT we have already included them in previous 100 and 40, i.e. they are part of those 100 and 40, so we don't need to count them again) = 120
2007-06-06 20:14:47 · answer #4 · answered by ArArAt 3 · 0⤊ 0⤋
This is not as tough as it looks. Only two languages are there. Every delegate speaks at least one language (English or French) So, your answer is all the delegates
2007-06-06 19:33:08 · answer #5 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
All delegates speak at least one language. That is, 100 of them.
2007-06-06 19:26:32 · answer #6 · answered by Sparks 6 · 0⤊ 0⤋