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Two thirds of the students in a class are boys and the rest girls. It is known that the probability of a girl getting a first class is 0.25 and that of a boy getting a first class is 0.28. find the probability that a student chosen at random will get first class marks in the subject.
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Sep 6, 2020
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General Knowledge
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anonymous
कक्षा में छात्रों के दो तिहाई लड़के और बाकी लड़कियां हैं। यह ज्ञात है कि पहली कक्षा प्राप्त करने वाली लड़की की संभावना 0.25 है और एक लड़का की पहली कक्षा 0.28 है। संभावना है कि यादृच्छिक रूप से चुने गए छात्र को विषय में प्रथम श्रेणी के अंक मिलेंगे।
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