RRB Technician Grade 3 practice question
From 9 men and 6 women, in how many ways can a committee of 4 be formed having at least 1 women?
From a RRB Technician Grade 3 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (C) 1239
Summing over the valid cases for the number of women chosen: C(6,1)×C(9,3) + C(6,2)×C(9,2) + C(6,3)×C(9,1) + C(6,4)×C(9,0) = 1239.
हिंदी में प्रश्न
9 पुरुषों और 6 महिलाओं में से, 4 सदस्यों की एक समिति कितने तरीकों से बनाई जा सकती है जिसमें कम से कम 1 महिलाएँ हों?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 1239
चयनित महिलाओं की संख्या के मान्य मामलों को जोड़ने पर: C(6,1)×C(9,3) + C(6,2)×C(9,2) + C(6,3)×C(9,1) + C(6,4)×C(9,0) = 1239।
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