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Out of 80 students in a class , 30 pas...

Out of 80 students in a class , 30 passed in Mathematices , 20 in Electronics and 10 in both. If one students is selected at random . The probability that the has passed in none of the subject in

A

a) 3/5

B

b) 1/4

C

c) 3/2

D

d) 1/2

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