For each of the following statements, say whether it is true or false, and give a reason for your answer. assume for each of the statements that if person a knows person b, then b also knows a. (a) the number of people at a party that know an odd number of other people at the party must always be even. (b) the number of people at a party for which the number of other people at the party that they don’t know is odd, must always be even. (c) the number of people at a party that know an even number of other people at the party must always be even. (d) it is possible that no two persons at a party know the same number of other people at the party.

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.