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