There are 23 distinct numbers in set M, there are 28 distinct numbers in set N, and there are 12 distinct numbers that are in both sets M and N. Set H is the set containing the elements that are in at least one of sets M and N. How many elements are in set H? Options:
A) 39
B) 40
C) 51
D) 58
E) 63
{Total} = {M} + {N} - {Both}   {Total} = 23 + 28 - 12= 
<gadget id="calculator">23 + 28 - 12</gadget>
<output>39</output>
39.   39nswer: 39.
<result>A</result>
There are 23 distinct numbers in set M, there are 28 distinct numbers in set N, and there are 12 distinct numbers that are in both sets M and N. Set H is the set containing the elements that are in at least one of sets M and N. How many elements are in set H?