Question 1206322
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A population can be divided into two {{{highlight(highlight(disjoint))}}} subgroups that occur with probabilities 60% and 40%, respectively. 
An event A occurs 10% of the time in the first subgroup and 50% of the time in the second subgroup. 
What is the unconditional probability of the event A, regardless of which subgroup it comes from?
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        I changed/edited the condition of the problem 
        according to my understanding on how is  SHOULD  BE.


        I firmly believe that without such editing the problem can not be solved.



<pre>
The probability that event A will happen in the first group is 0.1*0.6.

The probability that event A will happen in the second group is 0.5*0.4.


Since the groups are {{{highlight(highlight(disjoint))}}}, the probability that event A will happen in either group
is the sum

    P = 0.1*0.6 + 0.5*0.4 = 0.06 + 0.2 = 0.26.    <U>ANSWER</U>
</pre>

Solved.