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Q.

The probability that a candidate secure a seat in Engineering through EAMCET is 15 . 10 candidates are selected at random from a centre. The probability that exactly 4 will get seats is

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a

15(0.1)2 (09)5

b

210(0.2)4 (0.8)6

c

21(0.1)2 (0.9)5

d

(0.1)2 (0.9)5

answer is B.

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Detailed Solution

n=10,p=15,   q=45 p(X=4)= 10C4(45)6(15)4
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