MathsJEE Main 5 Apr 2026, Shift 1·Q7·MCQ·Moderate

Probability · Bayes theorem

A letter is known to have arrived by post either from KANPUR or from ANANTPUR. On the envelope just two consecutive letters AN are visible. The probability, that the letter came from ANANTPUR, is:

(1) $\dfrac{7}{10}$
(2) $\dfrac{10}{17}$
(3) $\dfrac{12}{19}$
(4) $\dfrac{7}{19}$

We corrected a printing error in the original paper

Source printed “On the the envelope” (doubled word).

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Probability · Bayes theorem

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