Question

IN certain Ethiopian highschool 100 students are studing english ,85 are studing french and 35 studing both languages . then how many students are studing one of the foregin language

Answer 1

65 are taking just one of the foreign languages.

Explanation:

Let S be the number of students studying one of the foreign languages (French and/or English).

We are told that ".85" are studying French. Let's assume that .85 is the fraction 0.85, or 85%.

Since there are 100 students, we can find the number studying French:

French = 100*(0.85) = 85 students studying French.

It is unclear what "35" represents. As written, it states that 35 students are studying both languages. We'll assume it was not meant to be 0.35 or 35%.

If 35 students are studying both languages, it means that 35 of the 85 students we found studying French are also studying English.

(85 - 35) = 50 students studying just French

35 students studying both

That leaves (100 - 865) or 15 students studying just English.

So the total studying just one foreign language is (50 + 35) = 85 studying just one language.

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This was the long way to a correct answer. If we think about what the problem has told us, there are 100 students and 35 are taking both languages. Then it means that the remainder are taking just one language. 100 - 35 = 65 taking just one language.

Answer 2

Answer: 150

Step-by-step explanation: By adding 100 and 85, we get the number of students studying at least one language. The result is 185. Then, we subtract 35 (the number of students studying two languages). The final result is 150