Question 1126846
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In a group of 20 people, 15 are right-handed and 1 is ambidextrous what is the probability that a person selected t random is 


<pre>
a) left-handed?      The probability is  {{{(20-15-1)/20}}}.


b) ambidextrous?     The probability is  {{{1/20}}}.
</pre>

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It is not about Math.


It is to check if the student is able to read and understand English.