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1. The ratio of boys and girls in a school is to 7. If there are 150 boys and girls, how many boys are there?

  • A. 75
  • B. 75
  • C. 75
  • D. 75

Answer: Option B

Explanation:

ধরি, ছাত্রের সংখ্যা = 3x ও ছাত্রীর সংখ্যা = 7x
∴∴ 3x + 7x = 150
⇒⇒ 10x = 150
⇒⇒ x = 1501015010
⇒⇒ x = 15
∴∴ ছাত্রের সংখ্যা = (3×15)3×15 জন = 45 জন।

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