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Quantitative Aptitude MCQ - Probability

51 If cov (X, Y) = 0, then which of the following is negative?

Cov (X, Y), b_yx, b_xy and p(X,Y) all are either positive, or 0 or negative simultaneously

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Sun, 11 OctExam todayIBPS Clerk 2026 Prelims Examination (Day 2)

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Question:

Three machines M1, M2 and M3 produce identicalitems. Of their respective output 5%, 4% and 3%of items are faulty. On a certain day, M1 hasproduced 25% of the…

A. 0.155
B. 0.255
C. 0.355
D. 0.455

Correct answer: C

Explanation:

Let the event of drawing a faulty item from any of the machines be A, and the event that an item drawn at random was produced by Mi…

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