Four persons can hit a target correctly with
probabilities
${1 \over 2}$, ${1 \over 3}$, ${1 \over 4}$ and
${1 \over 8}$ respectively. if all hit
at the target independently, then the probability that
the target would be hit, is :
${{25} \over {32}}$
${{25} \over {192}}$
${{1} \over {192}}$
${{7} \over {32}}$
Solution
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