From a class, one-fourth opted to learn German; two-fifths of the remaining students chose Italian. Two-thirds of the remaining students decided to learn French and the rest Japanese. If 72 people decided to learn Japanese, how many of them opted for Italian?

From a class, one-fourth opted to learn German; two-fifths of the remaining students chose Italian. Two-thirds of the remaining students decided to learn French and the rest Japanese. If 72 people decided to learn Japanese, how many of them opted for Italian? Correct Answer 144

Let the total number students in the class be 200

According to question:

One-fourth opted to learn German

⇒ (1/4) × 200 = 50

⇒ 50 opted for German

Remaining students = (200 – 50) = 150

Two-fifths of the remaining students chose Italian

⇒ (2/5) × 150 = 60

⇒ 60 opted for Italian

Remaining students = (150 – 60) = 90

Two-thirds of the remaining students decided to learn French

⇒ (2/3) × 90 = 60

⇒ 60 opted for French

Remaining students = 90 – 60 = 30

30 students opted for Japanese

But in this question given, 72 students opted for Japanese

⇒ 30 units = 72 students

⇒ 1 unit = 72/30

⇒ 60 = (72/30) × 60 = 144

∴ 144 students opted for Italian

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