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In four schools B(1),B(2),B(3),B(4) th...

In four schools `B_(1),B_(2),B_(3),B_(4)` the percentage of girls students is 12,20,13,17 respectively. From a school selected at random, one student is picked up at random and it is found that the student is a girl. The probability that the school selected is `B_(2)` , is

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