The probability that a candidate secure a seat in Engineering through EAMCET is 110 . Seven candidates are selected at random from a centre. The probability that exactly two will get seats is
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a
15 (0.1)2 (09)5
b
20 (0.1)2 (0.9)5
c
21 (0.1)2 (0.9)5
d
(0.1)2 (0.9)5
answer is C.
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Detailed Solution
Given that: p =110,q=910 P(X=2)=7C2(0.9)5(0.1)2 = 21(0.1)2(0.9)5
The probability that a candidate secure a seat in Engineering through EAMCET is 110 . Seven candidates are selected at random from a centre. The probability that exactly two will get seats is