RRB NTPC CBT-1 previous year question

At a health club, 40% of the members are women and 60% of the members are men. If the average age of the men is 51 years and the average age of the women is 55 years, what is the average age (in years) of all the members?

Asked in RRB NTPC 2026 — 14 June Shift 1 · Quantitative Aptitude

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Correct answer: (C) 52.6

Using weighted average: 40% women at 55 years and 60% men at 51 years gives average age = 0.4*55 + 0.6*51 = 22+30.6 = 52.6 years.

हिंदी में प्रश्न

एक हेल्‍थ क्लब में, 40% सदस्य महिलाएं हैं और 60% सदस्य पुरुष el यदि पुरुषों की औसत आयु 51 वर्ष है और महिलाओं को औसत आयु 55 वर्ष है, तो सभी सदस्यों को औसत आयु (वर्ष में) कितनी है?

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सही उत्तर: (C) 52.6

भारित औसत का उपयोग करने पर: 40% महिलाएँ (55 वर्ष) और 60% पुरुष (51 वर्ष) का औसत आयु = 0.4*55 + 0.6*51 = 22+30.6 = 52.6 वर्ष।

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At a health club, 40% of the members are women and 60% of the members are men. If the average age of the men is 51 years and the average age of the women is 55 years, what is the average age (in years) of all the members?

हिंदी में प्रश्न

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