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AP EAMCET202125 Aug 2021Morning ShiftMathematicsProbabilityActual

One ticket is selected at random from 50 tickets numbered 00,01,02, 49 . The probability that sum of the digits is 10 , given that product of the digits is 9 , is

Options

  1. A9 / 10
  2. B1 / 4
  3. C1 / 2
  4. D2 / 25

Correct answer

C. 1 / 2

Step-by-step solution

A= Sum of digits is 10 B= Product of digits is 9 A= 19,28,37,46 n(A)=4n(B)=2n(S)=50B= 19,33 P(A)= 4 50 and P(B)= 2 50 P(A B)= 1 50 Required probability, P ( A B )= P(A B) P(B) = 1 2

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