2010-01-26 23:01:54 +0000 #1
2010-01-26 23:18:22 +0000 #2
83 +75- (100-10) = 68
a total of 100 people, two are not there are 10 people. At least one of there 90. Assume that everyone will be kind, then it should be 158. More than 90 of that part is the will of the two kinds.
a total of 100 people, two are not there are 10 people. At least one of there 90. Assume that everyone will be kind, then it should be 158. More than 90 of that part is the will of the two kinds.
2010-01-26 23:24:15 +0000 #3
driving and swimming will also set the number of x:
only people who drive 83-x
only swimmer is 75-x
different from those who are not all together is equal to 10
100
formula: (83-x) + (75-x) + x +10 = 100
x = 68
only people who drive 83-x
only swimmer is 75-x
different from those who are not all together is equal to 10
100
formula: (83-x) + (75-x) + x +10 = 100
x = 68
