Ashifur August 8, 2023 - 14:42
Problem: তিন ভাই-বোনের বয়সের গড় ১৬ বছর । পিতাসহ ভাই-বোনের বয়সের গড় ২৫ বছর। পিতার বয়স কত?

View all: BANGLADESH BANK BANKERS | WRITTEN QUESTION (MATH) SOLVE | 1986

Correct Answer: উত্তরঃ পিতার বয়স ৫২ বছর ।

Explanation:

তিন ভাই-বোনের বয়সের গড় =১৬ বছর

তিন ভাইবোনের বয়সের সমষ্টি = (১৬ × ৩) বছর = ৪৮

পিতাসহ ভাই-বোনের বয়সের গড় ২৫ বছর।

পিতাসহ তিন ভাইবোনের বয়সের সমষ্টি = (২৫ × ৪) বছর=100 বছর

পিতার বয়স = (১০০ – ৪৮) বছর = ৫২ বছর ।

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