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Find the probability of guessing at least 6 out of 10 answers in i) True false type examination ii) Multiple choice with 4 possible answers

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Answer :i) `UNDERSET(r=6)OVERSET(10)SUM""^(10)C_(r)((1)/(2))^(10)`ii) `underset(r=6)overset(10)sum""^(10)C_(r)((1)/(4))^( r )((3)/(4))^(10-r)`


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