A student has to select 3 subject out of 6 subjects M,B,H,U,L. If he has chosen M, what is the probability of B being chosen ? Pick.
A) 2/5
B) 1/5
C) 3/5
D) 7/5
E) None of these
Explanation :   Out of 6 subjects, one subject M has already been chosen. Ramaining 2 subjects are to be choden from rest (6-1) i.e 5 subjects.   Without restriction, no. of selections = 5C2.   With restriction, no. of selection of B from rest 4 subject = 4C1.   =&gt; Probability   = Selections with restriction / Selections without restriction   = 4C1 / 5C2 .   = 2 / 5.   Hence, the probability of subject B being chosen is 2 / 5.   2/5nswer : 2/5
<result>A</result>
A student has to select 3 subject out of 6 subjects M,B,H,U,L. If he has chosen M, what is the probability of B being chosen ?