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In an exam 52% of the candidates failed in science, 42% in maths and 17% in both.

 

In a exam 52% of the candidates failed in science, 42% in maths and 17% in both. The number of those who passed in both the subjects is

 

  • Option 1)

     

    83%    

     

  • Option 2)

     

    64%    

     

  • Option 3)

     

    23%

     

  • Option 4)

     

    42%

     

  • Option 5)

     

    55.5%

     

Answers (1)
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A admin

Total Students = 100

Failed in Science n(s) = 52

Failed in Math n(m) = 42

Failed in Both n(s&m) = 17

Failed in either math or science n(m or s)

N(m or s) =  n(m) + n(s) - n(m & s)

N(m or s) = 52 + 42 - 17 = 77

Passed in both the subjects = 100 - 77 = 23

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