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Grade 11Algebra

Ans is 3/4 according to the sk goyal bookPlease give me solution of this question

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Profile image of Durgesh Brahmankar
8 Years agoGrade 11
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1 Answer

Profile image of Arun
ApprovedApproved Tutor Answer8 Years ago
Dear Durgesh
 
we want that question should be just solved.
Hence
P(solving the question) = 1 – P(No one solved the question)
 = 1 – [(1 – 1/2)(1 – 1/3)(1 – 1/4)]
 = 1 – [1/2 * 2 / 3 * 3/4]
 = 1 – ¼
 = 3/4
 
Regards
Arun (askIITians forum expert)