Multiple choice

Three seminars were conducted on healthy eating, lifestyle and stress. The ratio of number of attendees in each seminar was 7:9:8 and it was known that a person attends either one or all three seminars. If 144 people from a total of 1392 people attending the seminars, came to all 3 of them. Considering the people that attended one seminar only, what is the average number of people that went for healthy eating or lifestyle? सेहतपूर्ण भोजन, जीवनशैली और तनाव पर तीन सेमिनार आयोजित किये गये। प्रत्‍येक सेमिनार में भाग लेने वाले लोगों की संख्‍या में अनुपात 7:9:8 था और यह ज्ञात था कि कोई व्‍यक्ति या तो एक अथवा तीनों सेमिनारों में भाग लेता है। यदि कुल 1392 लोगों में से 144 लोगों ने तीनों सेमिनार में हिस्‍सा लिया हो, तो केवल एक सेमिनार में भाग लेने वाले लोगों की संख्‍या को ध्‍यान में रखकर बेहतर भोजन अथवा जीवनशैली के लिये जाने वाले लोगों की औसत संख्‍या क्‍या है?

  1. 320

  2. 160

  3. 480

  4. 288

  5. None of these इनमे से कोई नहीं

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A Correct answer
Explanation

Total ratio units: 7+9+8 = 24. Total people: 1392. Each unit = 1392/24 = 58. Healthy eating: 7×58 = 406, Lifestyle: 9×58 = 522, Stress: 8×58 = 464. People attending only one seminar = 1392 - 144 = 1248 (subtracting those who attended all 3). Only healthy: 406-144 = 262, Only lifestyle: 522-144 = 378. Average of these = (262+378)/2 = 320.